Doug's Headers - D303Y-B

Doug's Headers D303Y-B 1 3/4" Tri-Y Header Chevrolet Truck Big Block Chevrolet 68-87 Hi-Temp Black Coating

Doug's Headers D303Y-B 1 3/4" Tri-Y Header Chevrolet Truck Big Block Chevrolet 68-87 Hi-Temp Black Coating

Part Number: D303Y-B / UPC 694342543006
  • Doug's Headers D303Y-B 1 3/4" Tri-Y Header Chevrolet Truck Big Block Chevrolet 68-87 Hi-Temp Black Coating

Highlights
  • 3/8" Thick machined flanges...no warping
  • CNC mandrel bent tubes... accurate fit & better flow
  • Tri-Y headers yield maximum power from off idle to 4500 RPM making them well suited for applications demanding maximum mid-range torque with maximum fuel economy
  • Heavy 16 gauge tubing...longer life
  • Tubes are pre-polished to remove scratches and the header is finished with a Hi-Temp Black Coating

Applications and Footnotes

Chevrolet - Class A (chevrolet chassis)
YEARS 75 - 91
ENGINES 396-502
EMISSION CODE Emissions Code 3
A/C Y
P/B Y
P/S Y
AUTO COL Y
AUTO FLR Y
STD COL N
STD FLR N
TUBE SIZE (in.) 1 3/4 - 2
COLLECTOR SIZE (in.) 2 1/2
PORT SHAPE SAP
Available with optional smog pump provision. Dual smog pump applications add DP to the end of header part number. Single smog pump applications add SP to end of header part number
Carbureted applications only
Fits P30 chassis
Non catalytic converter equipped.
Tri-Y design

Chevrolet/GMC - GMC 2WD TRUCKS & SUV
YEARS 68 - 87
ENGINES 396-502
EMISSION CODE Emissions Code 3
A/C Y
P/B Y
P/S Y
AUTO COL Y
AUTO FLR Y
STD COL Y
STD FLR Y
TUBE SIZE (in.) 1 3/4 - 2
COLLECTOR SIZE (in.) 2 1/2
PORT SHAPE SAP
Available with optional smog pump provision. Dual smog pump applications add DP to the end of header part number. Single smog pump applications add SP to end of header part number
Big block frame stands and motor mounts must be used to insure proper engine location and header fit.
Does not fit 4 speed applications with bell housing mounts
Non catalytic converter equipped.
Tri-Y design

Chevrolet/GMC - 1/2, 3/4, 1 Ton / 1500, 2500, 3500 TRUCKS
YEARS 68 - 87
ENGINES 396-502
EMISSION CODE Emissions Code 3
A/C Y
P/B Y
P/S Y
AUTO COL Y
AUTO FLR Y
STD COL Y
STD FLR Y
TUBE SIZE (in.) 1 3/4 - 2
COLLECTOR SIZE (in.) 2 1/2
PORT SHAPE SAP
Available with optional smog pump provision. Dual smog pump applications add DP to the end of header part number. Single smog pump applications add SP to end of header part number
Big block frame stands and motor mounts must be used to insure proper engine location and header fit.
Does not fit 4 speed applications with bell housing mounts
Non catalytic converter equipped.
Tri-Y design

Chevrolet/GMC - 4 Ton / 3500 Crew, Standard Cab DUALLY
YEARS 73 - 91
ENGINES 396-502
EMISSION CODE Emissions Code 3
A/C Y
P/B Y
P/S Y
AUTO COL Y
AUTO FLR Y
STD COL Y
STD FLR Y
TUBE SIZE (in.) 1 3/4 - 2
COLLECTOR SIZE (in.) 2 1/2
PORT SHAPE SAP
Available with optional smog pump provision. Dual smog pump applications add DP to the end of header part number. Single smog pump applications add SP to end of header part number
Big block frame stands and motor mounts must be used to insure proper engine location and header fit.
Does not fit 4 speed applications with bell housing mounts
Non catalytic converter equipped.
Tri-Y design

Chevrolet/GMC - 8 Ton / 3500 Crew, Standard Cab DUALLY
YEARS 73 - 91
ENGINES 396-502
EMISSION CODE Emissions Code 3
A/C Y
P/B Y
P/S Y
AUTO COL Y
AUTO FLR Y
STD COL Y
STD FLR Y
TUBE SIZE (in.) 1 3/4 - 2
COLLECTOR SIZE (in.) 2 1/2
PORT SHAPE SAP
Available with optional smog pump provision. Dual smog pump applications add DP to the end of header part number. Single smog pump applications add SP to end of header part number
Big block frame stands and motor mounts must be used to insure proper engine location and header fit.
Does not fit 4 speed applications with bell housing mounts
Non catalytic converter equipped.
Tri-Y design

Chevrolet/GMC - Blazer / Jimmy, Suburban, Tahoe / Yukon
YEARS 68 - 87
ENGINES 396-502
EMISSION CODE Emissions Code 3
A/C Y
P/B Y
P/S Y
AUTO COL Y
AUTO FLR Y
STD COL Y
STD FLR Y
TUBE SIZE (in.) 1 3/4 - 2
COLLECTOR SIZE (in.) 2 1/2
PORT SHAPE SAP
Available with optional smog pump provision. Dual smog pump applications add DP to the end of header part number. Single smog pump applications add SP to end of header part number
Does not fit 4 speed applications with bell housing mounts
Non catalytic converter equipped.
Tri-Y design

Key for abbreviations and acronyms
2V Two valve cylinder head
DP Dual Smog Pump (emissions device)
PSIG Pounds Per Square Inch Gauge
3V Three valve cylinder head
E.O. Executive Order
RD Round Port
4V Four valve cylinder head
EGR Exhaust Gas Recirculation (emissions device)
REC Rectangle Port
A/C Air Conditioning
FLR Floor
SAP Same As (cylinder head) Port
AUTO Automatice Transmission
MCTBC Metallic Ceramic Thermal Barrier Coating
SP Single Smog Pump (emissions device)
COL Column shift
OVL Oval Port
STD Standard Transmission
COLL Collector
P/B Power Brakes
T.P.I. Tuned Port Injection
DIA Diameter
P/S Power Steering

Emissions Code Key

The application guide above specifies which Emissions Code applies to this part. Doug's Headers uses a voluntary product identification program whereby all mission-sensitive products can be identified by placing numbered labels in product packaging and listing corresponding numeric codes next to each part number. The corresponding numbers and explanations are as follows:

This Product has been granted a California Air Resources Board (CARB) "E.O" (Executive Order) Exemption, or is considered a Direct Replacement or Consolidated Replacement part. It is 50 State Legal when installed on the appropriate vehicle per the Manufacturer Application guide and Installation Instructions

This product is Legal for use on 1974 and older non catalyst equipped vehicles and is considered a "replacement part" per California Air Resources Board regulations, as long as ALL emissions sensitive components are retained, including A.I.R., EGR, Heat Risers etc. Failure to retain any of these components, or use on any 1975 or newer catalytic converter equipped car would render this product Illegal for Street or Off Highway Use in California, or in states that have adopted California Emissions regulations and may only be used for Closed Course Competition.

This product is Not legal for Street or Off Highway use in California or in states that have adopted California Emissions Regulations and is only intended for Closed Course Competition use, except 1965 and Older US manufactured California Certified vehicles, 1967 or older US manufactured Federally Certified vehicles, or 1967 and older Foreign manufactured vehicles which may have any aftermarket add-on or modified part installed as long as the vehicle can still meet the tailpipe emission standards for the year of the vehicle and retain any original or retrofit crankcase control (PCV) devices and NOx device required for the year of the vehicle.

Additional Information

Doug's 2/4 WD TRUCK HEADERS Tri-Y Hi-Temp Black Coated Header development and design is complex and requires a substantial amount of time and resources to do the job right! Many manufacturers are unwilling to make the commitment and instead offer compromised headers at lower prices. Doug's will not compromise performance, quality or fit to compete with inferior designs at cheap prices. Every Doug's header is tuned with the proper tube size and length to efficiently remove all the exhaust from each cylinder, reducing pumping losses resulting in a dramatic increases in horsepower and torque. Doug's headers are carefully developed on the vehicles they are intended to fit and are re-checked numerous times during the design and manufacturing process.

Installation instructions
Instruction Manual
Installation Instructions

Download PDF

Shipping & Delivery

Our ignition and exhaust products ship from our warehouse in Lenexa, KS. Our normal shipping time is 2-3 business days for in-stock parts.

 Shipping Class Order Value Shipping Cost
UPS Ground $0 - 49.99 $6.99 flat rate
UPS Ground $50 - 98.99 $7.49 flat rate
UPS Ground $99+ Free

  • At this time, PerTronix does not offer expedited shipping options from our website.
  • All packages must be inspected upon receipt for any missing or damaged goods and claims for such must be made within 7 days of receipt.
  • PerTronix does not currently ship our products internationally from our web store. For international orders call 909-599-5955 or connect with us here.

Returns & Replacements

Returns at Pertronix are accepted within 90 days of purchase with prior authorization, ensuring items are in new, resalable condition. To initiate a return, call for an RGA and follow provided instructions. Customers are responsible for return shipping, using a trackable method.

Refunds exclude initial shipping and handling fees and may be subject to a restocking fee. For defective or damaged items, contact Pertronix directly. We are not responsible for user-initiated damage/loss of parts.

For complete details, visit our Returns page.

Reviews

Doug's Headers - D303Y-B

Doug's Headers D303Y-B 1 3/4" Tri-Y Header Chevrolet Truck Big Block Chevrolet 68-87 Hi-Temp Black Coating

Doug's Headers D303Y-B 1 3/4" Tri-Y Header Chevrolet Truck Big Block Chevrolet 68-87 Hi-Temp Black Coating

Part Number: D303Y-B / UPC 694342543006
$721.45
$721.45

Part Number: D303Y-B / UPC 694342543006
Does This part fit My vehicle?
View All Vehicle Applications

Need help? Call us at 909-599-5955

  • Free shipping on $99+ orders in lower 48 states
  • 90-day return policy
  • We’re here to help! Call us on 909-599-5955
Emissions code

Emissions Code

Continue Reading to Understand Emissions Codes

Complete Your Installation

Doug's Headers D303Y-B 1 3/4" Tri-Y Header Chevrolet Truck Big Block Chevrolet 68-87 Hi-Temp Black Coating

Doug's Headers D303Y-B 1 3/4" Tri-Y Header Chevrolet Truck Big Block Chevrolet 68-87 Hi-Temp Black Coating

Doug's Headers D303Y-B 1 3/4" Tri-Y Header Chevrolet Truck Big Block Chevrolet 68-87 Hi-Temp Black Coating

Part Number: D303Y-B
$721.45
$721.45
Total price: $721.45
View full details

Highlights
  • 3/8" Thick machined flanges...no warping
  • CNC mandrel bent tubes... accurate fit & better flow
  • Tri-Y headers yield maximum power from off idle to 4500 RPM making them well suited for applications demanding maximum mid-range torque with maximum fuel economy
  • Heavy 16 gauge tubing...longer life
  • Tubes are pre-polished to remove scratches and the header is finished with a Hi-Temp Black Coating

Applications and Footnotes

Chevrolet - Class A (chevrolet chassis)
YEARS 75 - 91
ENGINES 396-502
EMISSION CODE Emissions Code 3
A/C Y
P/B Y
P/S Y
AUTO COL Y
AUTO FLR Y
STD COL N
STD FLR N
TUBE SIZE (in.) 1 3/4 - 2
COLLECTOR SIZE (in.) 2 1/2
PORT SHAPE SAP
Available with optional smog pump provision. Dual smog pump applications add DP to the end of header part number. Single smog pump applications add SP to end of header part number
Carbureted applications only
Fits P30 chassis
Non catalytic converter equipped.
Tri-Y design

Chevrolet/GMC - GMC 2WD TRUCKS & SUV
YEARS 68 - 87
ENGINES 396-502
EMISSION CODE Emissions Code 3
A/C Y
P/B Y
P/S Y
AUTO COL Y
AUTO FLR Y
STD COL Y
STD FLR Y
TUBE SIZE (in.) 1 3/4 - 2
COLLECTOR SIZE (in.) 2 1/2
PORT SHAPE SAP
Available with optional smog pump provision. Dual smog pump applications add DP to the end of header part number. Single smog pump applications add SP to end of header part number
Big block frame stands and motor mounts must be used to insure proper engine location and header fit.
Does not fit 4 speed applications with bell housing mounts
Non catalytic converter equipped.
Tri-Y design

Chevrolet/GMC - 1/2, 3/4, 1 Ton / 1500, 2500, 3500 TRUCKS
YEARS 68 - 87
ENGINES 396-502
EMISSION CODE Emissions Code 3
A/C Y
P/B Y
P/S Y
AUTO COL Y
AUTO FLR Y
STD COL Y
STD FLR Y
TUBE SIZE (in.) 1 3/4 - 2
COLLECTOR SIZE (in.) 2 1/2
PORT SHAPE SAP
Available with optional smog pump provision. Dual smog pump applications add DP to the end of header part number. Single smog pump applications add SP to end of header part number
Big block frame stands and motor mounts must be used to insure proper engine location and header fit.
Does not fit 4 speed applications with bell housing mounts
Non catalytic converter equipped.
Tri-Y design

Chevrolet/GMC - 4 Ton / 3500 Crew, Standard Cab DUALLY
YEARS 73 - 91
ENGINES 396-502
EMISSION CODE Emissions Code 3
A/C Y
P/B Y
P/S Y
AUTO COL Y
AUTO FLR Y
STD COL Y
STD FLR Y
TUBE SIZE (in.) 1 3/4 - 2
COLLECTOR SIZE (in.) 2 1/2
PORT SHAPE SAP
Available with optional smog pump provision. Dual smog pump applications add DP to the end of header part number. Single smog pump applications add SP to end of header part number
Big block frame stands and motor mounts must be used to insure proper engine location and header fit.
Does not fit 4 speed applications with bell housing mounts
Non catalytic converter equipped.
Tri-Y design

Chevrolet/GMC - 8 Ton / 3500 Crew, Standard Cab DUALLY
YEARS 73 - 91
ENGINES 396-502
EMISSION CODE Emissions Code 3
A/C Y
P/B Y
P/S Y
AUTO COL Y
AUTO FLR Y
STD COL Y
STD FLR Y
TUBE SIZE (in.) 1 3/4 - 2
COLLECTOR SIZE (in.) 2 1/2
PORT SHAPE SAP
Available with optional smog pump provision. Dual smog pump applications add DP to the end of header part number. Single smog pump applications add SP to end of header part number
Big block frame stands and motor mounts must be used to insure proper engine location and header fit.
Does not fit 4 speed applications with bell housing mounts
Non catalytic converter equipped.
Tri-Y design

Chevrolet/GMC - Blazer / Jimmy, Suburban, Tahoe / Yukon
YEARS 68 - 87
ENGINES 396-502
EMISSION CODE Emissions Code 3
A/C Y
P/B Y
P/S Y
AUTO COL Y
AUTO FLR Y
STD COL Y
STD FLR Y
TUBE SIZE (in.) 1 3/4 - 2
COLLECTOR SIZE (in.) 2 1/2
PORT SHAPE SAP
Available with optional smog pump provision. Dual smog pump applications add DP to the end of header part number. Single smog pump applications add SP to end of header part number
Does not fit 4 speed applications with bell housing mounts
Non catalytic converter equipped.
Tri-Y design

Key for abbreviations and acronyms
2V Two valve cylinder head
DP Dual Smog Pump (emissions device)
PSIG Pounds Per Square Inch Gauge
3V Three valve cylinder head
E.O. Executive Order
RD Round Port
4V Four valve cylinder head
EGR Exhaust Gas Recirculation (emissions device)
REC Rectangle Port
A/C Air Conditioning
FLR Floor
SAP Same As (cylinder head) Port
AUTO Automatice Transmission
MCTBC Metallic Ceramic Thermal Barrier Coating
SP Single Smog Pump (emissions device)
COL Column shift
OVL Oval Port
STD Standard Transmission
COLL Collector
P/B Power Brakes
T.P.I. Tuned Port Injection
DIA Diameter
P/S Power Steering

Emissions Code Key

The application guide above specifies which Emissions Code applies to this part. Doug's Headers uses a voluntary product identification program whereby all mission-sensitive products can be identified by placing numbered labels in product packaging and listing corresponding numeric codes next to each part number. The corresponding numbers and explanations are as follows:

This Product has been granted a California Air Resources Board (CARB) "E.O" (Executive Order) Exemption, or is considered a Direct Replacement or Consolidated Replacement part. It is 50 State Legal when installed on the appropriate vehicle per the Manufacturer Application guide and Installation Instructions

This product is Legal for use on 1974 and older non catalyst equipped vehicles and is considered a "replacement part" per California Air Resources Board regulations, as long as ALL emissions sensitive components are retained, including A.I.R., EGR, Heat Risers etc. Failure to retain any of these components, or use on any 1975 or newer catalytic converter equipped car would render this product Illegal for Street or Off Highway Use in California, or in states that have adopted California Emissions regulations and may only be used for Closed Course Competition.

This product is Not legal for Street or Off Highway use in California or in states that have adopted California Emissions Regulations and is only intended for Closed Course Competition use, except 1965 and Older US manufactured California Certified vehicles, 1967 or older US manufactured Federally Certified vehicles, or 1967 and older Foreign manufactured vehicles which may have any aftermarket add-on or modified part installed as long as the vehicle can still meet the tailpipe emission standards for the year of the vehicle and retain any original or retrofit crankcase control (PCV) devices and NOx device required for the year of the vehicle.

Additional Information

Doug's 2/4 WD TRUCK HEADERS Tri-Y Hi-Temp Black Coated Header development and design is complex and requires a substantial amount of time and resources to do the job right! Many manufacturers are unwilling to make the commitment and instead offer compromised headers at lower prices. Doug's will not compromise performance, quality or fit to compete with inferior designs at cheap prices. Every Doug's header is tuned with the proper tube size and length to efficiently remove all the exhaust from each cylinder, reducing pumping losses resulting in a dramatic increases in horsepower and torque. Doug's headers are carefully developed on the vehicles they are intended to fit and are re-checked numerous times during the design and manufacturing process.

Installation instructions
Instruction Manual
Installation Instructions

Download PDF

Shipping & Delivery

Our ignition and exhaust products ship from our warehouse in Lenexa, KS. Our normal shipping time is 2-3 business days for in-stock parts.

 Shipping Class Order Value Shipping Cost
UPS Ground $0 - 49.99 $6.99 flat rate
UPS Ground $50 - 98.99 $7.49 flat rate
UPS Ground $99+ Free

  • At this time, PerTronix does not offer expedited shipping options from our website.
  • All packages must be inspected upon receipt for any missing or damaged goods and claims for such must be made within 7 days of receipt.
  • PerTronix does not currently ship our products internationally from our web store. For international orders call 909-599-5955 or connect with us here.

Returns & Replacements

Returns at Pertronix are accepted within 90 days of purchase with prior authorization, ensuring items are in new, resalable condition. To initiate a return, call for an RGA and follow provided instructions. Customers are responsible for return shipping, using a trackable method.

Refunds exclude initial shipping and handling fees and may be subject to a restocking fee. For defective or damaged items, contact Pertronix directly. We are not responsible for user-initiated damage/loss of parts.

For complete details, visit our Returns page.

Reviews

Applications

Year / Make / Model 1968-1969 Chevrolet C10 Pickup
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 Chevrolet C10 Pickup
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 Chevrolet C10 Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 Chevrolet C20 Pickup
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 Chevrolet C20 Pickup
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 Chevrolet C20 Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 Chevrolet C30 Pickup
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 Chevrolet C30 Pickup
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 Chevrolet C30 Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 Chevrolet K10 Pickup
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 Chevrolet K10 Pickup
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 Chevrolet K10 Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 Chevrolet K20 Pickup
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 Chevrolet K20 Pickup
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 Chevrolet K20 Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 Chevrolet K30 Pickup
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 Chevrolet K30 Pickup
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 Chevrolet K30 Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 Chevrolet Blazer
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1976-1978 Chevrolet K5 Blazer
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1975-1980 Chevrolet C10
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 Chevrolet C10 Suburban
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 Chevrolet C10 Suburban
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1980 Chevrolet C10 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1975-1987 Chevrolet C20
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 Chevrolet C20 Suburban
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 Chevrolet C20 Suburban
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1986 Chevrolet C20 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1975-1986 Chevrolet C30
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1988-1991 Chevrolet C3500
Engine Type V8
Engine Size(s) Cubic Inches: 454
Notes
  • Tri Y Design
  • Does not fit 4 Speed with Bellhousing Mounts

Year / Make / Model 1976 Chevrolet K10
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1980 Chevrolet K10
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 Chevrolet K10 Suburban
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 Chevrolet K10 Suburban
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 Chevrolet K10 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1976-1978 Chevrolet K20
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 Chevrolet K20 Suburban
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 Chevrolet K20 Suburban
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 Chevrolet K20 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.
  • Does not fit 4 speed applications with Factory Side bell housing mounts.

Year / Make / Model 1985 Chevrolet K20 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1977 Chevrolet K30
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1980-1986 Chevrolet K30
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1988-1991 Chevrolet K3500 Standard Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1987-1988 Chevrolet R20
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1987-1988 Chevrolet R20 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1989 Chevrolet R2500
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1989-1991 Chevrolet R2500 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1987-1988 Chevrolet R30
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1989-1991 Chevrolet R3500 Crew Cab Pickup
Engine Type V8
Engine Size(s) Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1989 Chevrolet R3500 Standard Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1989 Chevrolet R3500 Crew Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1987-1988 Chevrolet V20 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.
  • Tri Y design.

Year / Make / Model 1990 Chevrolet V2500 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1987-1988 Chevrolet V30 Standard Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1987-1988 Chevrolet V30 Crew Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1989-1991 Chevrolet V3500 Crew Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1989 Chevrolet V3500 Standard Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1989 Chevrolet V3500 Crew Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 GMC C15/C1500 Pickup
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 GMC C15/C1500 Pickup
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 GMC C15/C1500 Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 GMC C15/C1500 Suburban
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 GMC C15/C1500 Suburban
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 GMC C15/C1500 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 GMC C25/C2500 Pickup
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 GMC C25/C2500 Pickup
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 GMC C25/C2500 Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 GMC C25/C2500 Suburban
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 GMC C25/C2500 Suburban
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 GMC C25/C2500 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 GMC C35/C3500 Pickup
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 GMC C35/C3500 Pickup
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 GMC C35/C3500 Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 GMC K15/K1500 Pickup
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 GMC K15/K1500 Pickup
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 GMC K15/K1500 Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 GMC K15/K1500 Suburban
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 GMC K15/K1500 Suburban
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 GMC K15/K1500 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 GMC K25/K2500 Pickup
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 GMC K25/K2500 Pickup
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 GMC K25/K2500 Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 GMC K25/K2500 Suburban
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 GMC K25/K2500 Suburban
Engine Type V8
Engine Size(s) Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 GMC K25/K2500 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1968-1969 GMC K35/K3500 Pickup
Engine Type V8
Engine Size(s) Liters: 6.5
Cubic Inches: 396
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1970-1972 GMC K35/K3500 Pickup
Engine Type V8
Engine Size(s) Liters: 6.6
Cubic Inches: 402
Notes
  • Does not fit 4 speed applications with Factory Side bell housing mounts.
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1979-1980 GMC C1500
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1979-1980 GMC C1500 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1979-1986 GMC C2500
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1979-1986 GMC C2500 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1979-1986 GMC C3500
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.
  • Tri Y design.

Year / Make / Model 1988-1991 GMC C3500
Engine Type V8
Engine Size(s) Cubic Inches: 454
Notes

Year / Make / Model 1979-1986 GMC C3500 Standard Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1979-1986 GMC C3500 Crew Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1980 GMC K1500
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1979-1986 GMC K3500
Engine Type V8
Engine Size(s) Cubic Inches: 454
Notes

Year / Make / Model 1988-1991 GMC K3500
Engine Type V8
Engine Size(s) Cubic Inches: 454
Notes

Year / Make / Model 1979-1986 GMC K3500 Standard Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1979-1986 GMC K3500 Crew Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1987-1989 GMC R2500 Crew Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1987-1991 GMC R2500 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1987-1991 GMC R3500 Crew Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1987-1989 GMC R3500 Standard Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1987-1991 GMC V3500 Crew Cab Pickup
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1975-1978 GMC C15
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1975-1978 GMC C15 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1975-1978 GMC C25
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1975-1978 GMC C25 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1975-1978 GMC C35
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1973-1974 GMC Jimmy
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1976 GMC Jimmy
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1976 GMC K15
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1976-1978 GMC K25
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

Year / Make / Model 1976-1977 GMC K25 Suburban
Engine Type V8
Engine Size(s) Liters: 7.4
Cubic Inches: 454
Notes
  • Big block frame stands and motor mounts required for proper fit.

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