Doug's Headers - D370Y-B

Doug's Headers D370Y-B 1 5/8"-2" Tri-Y Header High temp Black Coating

Doug's Headers D370Y-B 1 5/8"-2" Tri-Y Header High temp Black Coating

Part Number: D370Y-B / UPC 694342544362
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Features & Benefits

  • 3/8" thick machined flanges to prevent warping
  • CNC mandrel bent tubes ensure accurate fit and better flow
  • Heavy 16-guage tubing for longer life
  • Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating

Doug's is the pioneering force behind the popular TRI-Y design for cars and trucks. The unique, shortend, paired primary tubes increase mid-range torque without sacrificing top end power. TRI-Y's are a great choice for daily drivers and heavy duty trucks looking to increase power from idle up to 4500 RPM while maintaining maximum fuel efficiency.


For the enthusiast who demands the best, Doug's Headers are not just components; they're a statement of excellence, a commitment to leading-edge performance, and a nod to the glory days of muscle cars and drag racing. Join the ranks of champions. Experience the unmatched quality and performance of Doug's Headers today.

Specifications

Finish Hi-Temp Black Coating
Material Steel
Design Tri-Y
Primary Tubing Diameter 1.625 IN
Collector Port Diameter 2.5 IN
Port Shape Oval
Tube Wall Thickness 16 Gauge
Flange Thickness 0.375 IN
Collector Attachment 3-Bolt Flange
EGT Port No
Oxygen Sensor Port No
Gasket Or Seal Included Yes
Mounting Hardware Included Yes
Color Black
Sheen Level Matte

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 - D370Y-B

Doug's Headers D370Y-B 1 5/8"-2" Tri-Y Header High temp Black Coating

Doug's Headers D370Y-B 1 5/8"-2" Tri-Y Header High temp Black Coating

Part Number: D370Y-B / UPC 694342544362
Regular price $638.95
Sale price $638.95 Regular price

Part Number: D370Y-B / UPC 694342544362
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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
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Features & Benefits

  • 3/8" thick machined flanges to prevent warping
  • CNC mandrel bent tubes ensure accurate fit and better flow
  • Heavy 16-guage tubing for longer life
  • Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating

Doug's is the pioneering force behind the popular TRI-Y design for cars and trucks. The unique, shortend, paired primary tubes increase mid-range torque without sacrificing top end power. TRI-Y's are a great choice for daily drivers and heavy duty trucks looking to increase power from idle up to 4500 RPM while maintaining maximum fuel efficiency.


For the enthusiast who demands the best, Doug's Headers are not just components; they're a statement of excellence, a commitment to leading-edge performance, and a nod to the glory days of muscle cars and drag racing. Join the ranks of champions. Experience the unmatched quality and performance of Doug's Headers today.

Specifications

Finish Hi-Temp Black Coating
Material Steel
Design Tri-Y
Primary Tubing Diameter 1.625 IN
Collector Port Diameter 2.5 IN
Port Shape Oval
Tube Wall Thickness 16 Gauge
Flange Thickness 0.375 IN
Collector Attachment 3-Bolt Flange
EGT Port No
Oxygen Sensor Port No
Gasket Or Seal Included Yes
Mounting Hardware Included Yes
Color Black
Sheen Level Matte

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 1978-1987 Chevrolet El Camino
Engine Type V8
Engine Size(s) Liters: 5.0
Cubic Inches: 305
Notes
  • Fits most angle plug heads.
  • Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
  • Requires removal or modification of locking steering columns if equipped.
  • Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
  • Does not fit with power glide transmission.

Year / Make / Model 1978-1979 Chevrolet El Camino
Engine Type V8
Engine Size(s) Liters: 5.7
Cubic Inches: 350
Notes
  • Fits most angle plug heads.
  • Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
  • Requires removal or modification of locking steering columns if equipped.
  • Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
  • Does not fit with power glide transmission.

Year / Make / Model 1983-1984 Chevrolet El Camino
Engine Type V8
Engine Size(s) Liters: 5.7
Cubic Inches: 350
Notes
  • Fits most angle plug heads.
  • Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
  • Requires removal or modification of locking steering columns if equipped.
  • Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
  • Does not fit with power glide transmission.

Year / Make / Model 1979-1982 Chevrolet El Camino
Engine Type V8
Engine Size(s) Liters: 4.4
Cubic Inches: 267
Notes
  • Fits most angle plug heads.
  • Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
  • Requires removal or modification of locking steering columns if equipped.
  • Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
  • Does not fit with power glide transmission.

Year / Make / Model 1978-1983 Chevrolet Malibu
Engine Type V8
Engine Size(s) Liters: 5.0, 5.7
Cubic Inches: 305, 350
Notes
  • Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
  • Requires removal or modification of locking steering columns if equipped.
  • Fits most angle plug heads.
  • Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
  • Does not fit with power glide transmission.

Year / Make / Model 1979-1982 Chevrolet Malibu
Engine Type V8
Engine Size(s) Liters: 4.4
Cubic Inches: 267
Notes
  • Fits most angle plug heads.
  • Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
  • Requires removal or modification of locking steering columns if equipped.
  • Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.

Year / Make / Model 1978-1988 Chevrolet Monte Carlo
Engine Type V8
Engine Size(s) Liters: 5.0
Cubic Inches: 305
Notes
  • Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
  • Requires removal or modification of locking steering columns if equipped.
  • Fits most angle plug heads.
  • Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
  • Does not fit with power glide transmission.

Year / Make / Model 1979-1982 Chevrolet Monte Carlo
Engine Type V8
Engine Size(s) Liters: 4.4
Cubic Inches: 267
Notes
  • Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
  • Requires removal or modification of locking steering columns if equipped.
  • Fits most angle plug heads.
  • Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
  • Does not fit with power glide transmission.

Year / Make / Model 1982-1984 Chevrolet Monte Carlo
Engine Type V8
Engine Size(s) Liters: 5.7
Cubic Inches: 350
Notes
  • Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
  • Requires removal or modification of locking steering columns if equipped.
  • Fits most angle plug heads.
  • Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
  • Does not fit with power glide transmission.

Year / Make / Model 1978-1980 Oldsmobile Cutlass
Engine Type V8
Engine Size(s) Liters: 5.0
Cubic Inches: 305
Notes
  • Does not fit with power glide transmission.
  • Fits most angle plug heads.
  • Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
  • Requires removal or modification of locking steering columns if equipped.
  • Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
  • Fits Factory Installed Chevrolet 265-350 small block engines.

Year / Make / Model 1978-1979 Oldsmobile Cutlass
Engine Type V8
Engine Size(s) Liters: 5.7
Cubic Inches: 350
Notes
  • Does not fit with power glide transmission.
  • Fits Factory Installed Chevrolet 265-350 small block engines.
  • Fits most angle plug heads.
  • Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
  • Requires removal or modification of locking steering columns if equipped.
  • Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.

Year / Make / Model 1983-1986 Pontiac Bonneville
Engine Type V8
Engine Size(s) Liters: 5.0
Cubic Inches: 305
Notes
  • Does not fit with power glide transmission.
  • Fits Factory Installed Chevrolet 265-350 small block engines.
  • Fits most angle plug heads.
  • Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
  • Requires removal or modification of locking steering columns if equipped.
  • Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.

Year / Make / Model 1978-1980 Pontiac Grand Prix
Engine Type V8
Engine Size(s) Liters: 5.0
Cubic Inches: 305
Notes
  • Does not fit with power glide transmission.
  • Fits Factory Installed Chevrolet 265-350 small block engines.
  • Fits most angle plug heads.
  • Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
  • Requires removal or modification of locking steering columns if equipped.
  • Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.

Year / Make / Model 1983-1987 Pontiac Grand Prix
Engine Type V8
Engine Size(s) Liters: 5.0
Cubic Inches: 305
Notes
  • Does not fit with power glide transmission.
  • Fits Factory Installed Chevrolet 265-350 small block engines.
  • Fits most angle plug heads.
  • Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
  • Requires removal or modification of locking steering columns if equipped.
  • Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.

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