Doug's Headers - D371Y-B
Doug's Headers D371Y-B 1 5/8" Tri-Y Header Chevrolet Truck Small Block Chevrolet 67-72 Hi-Temp Black Coating
Doug's Headers D371Y-B 1 5/8" Tri-Y Header Chevrolet Truck Small Block Chevrolet 67-72 Hi-Temp Black Coating
Highlights
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
Applications and Footnotes
Chevrolet/GMC - GMC 2WD TRUCKS & SUV |
||||||||||||
| YEARS | 67 - 72 | |||||||||||
| ENGINES | 265-400 | |||||||||||
| EMISSION CODE | ||||||||||||
| A/C | Y | |||||||||||
| P/B | Y | |||||||||||
| P/S | Y | |||||||||||
| AUTO COL | Y | |||||||||||
| AUTO FLR | Y | |||||||||||
| STD COL | N | |||||||||||
| STD FLR | Y | |||||||||||
| TUBE SIZE (in.) | 1 5/8 - 2 | |||||||||||
| COLLECTOR SIZE (in.) | 2 1/2 | |||||||||||
| PORT SHAPE | OVL | |||||||||||
| Better ground clearance than D372Y | ||||||||||||
| Does not fit 4 speed applications with bell housing mounts | ||||||||||||
| Fits D-Port cylinder heads including ZZ4 crate engines | ||||||||||||
| Fits most angle plug heads | ||||||||||||
| Tri-Y design | ||||||||||||
Chevrolet/GMC - Blazer / Jimmy, Suburban, Tahoe / Yukon |
||||||||||||
| YEARS | 67 - 72 | |||||||||||
| ENGINES | 265-400 | |||||||||||
| EMISSION CODE | ||||||||||||
| A/C | Y | |||||||||||
| P/B | Y | |||||||||||
| P/S | Y | |||||||||||
| AUTO COL | Y | |||||||||||
| AUTO FLR | Y | |||||||||||
| STD COL | N | |||||||||||
| STD FLR | Y | |||||||||||
| TUBE SIZE (in.) | 1 5/8 - 2 | |||||||||||
| COLLECTOR SIZE (in.) | 2 1/2 | |||||||||||
| PORT SHAPE | OVL | |||||||||||
| Better ground clearance than D372Y | ||||||||||||
| Does not fit 4 speed applications with bell housing mounts | ||||||||||||
| Fits D-Port cylinder heads including ZZ4 crate engines | ||||||||||||
| Fits most angle plug heads | ||||||||||||
| Tri-Y design | ||||||||||||
Additional Information
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
Installation instructions
Shipping & Delivery
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 & 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
Reviews
Doug's Headers - D371Y-B
Doug's Headers D371Y-B 1 5/8" Tri-Y Header Chevrolet Truck Small Block Chevrolet 67-72 Hi-Temp Black Coating
Doug's Headers D371Y-B 1 5/8" Tri-Y Header Chevrolet Truck Small Block Chevrolet 67-72 Hi-Temp Black Coating
Regular price
$692.45
Sale price
$692.45
Regular price
Unit price
per
Couldn't load pickup availability
- 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
Continue Reading to Understand Emissions Codes
Highlights
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
Applications and Footnotes
Chevrolet/GMC - GMC 2WD TRUCKS & SUV |
||||||||||||
| YEARS | 67 - 72 | |||||||||||
| ENGINES | 265-400 | |||||||||||
| EMISSION CODE | ||||||||||||
| A/C | Y | |||||||||||
| P/B | Y | |||||||||||
| P/S | Y | |||||||||||
| AUTO COL | Y | |||||||||||
| AUTO FLR | Y | |||||||||||
| STD COL | N | |||||||||||
| STD FLR | Y | |||||||||||
| TUBE SIZE (in.) | 1 5/8 - 2 | |||||||||||
| COLLECTOR SIZE (in.) | 2 1/2 | |||||||||||
| PORT SHAPE | OVL | |||||||||||
| Better ground clearance than D372Y | ||||||||||||
| Does not fit 4 speed applications with bell housing mounts | ||||||||||||
| Fits D-Port cylinder heads including ZZ4 crate engines | ||||||||||||
| Fits most angle plug heads | ||||||||||||
| Tri-Y design | ||||||||||||
Chevrolet/GMC - Blazer / Jimmy, Suburban, Tahoe / Yukon |
||||||||||||
| YEARS | 67 - 72 | |||||||||||
| ENGINES | 265-400 | |||||||||||
| EMISSION CODE | ||||||||||||
| A/C | Y | |||||||||||
| P/B | Y | |||||||||||
| P/S | Y | |||||||||||
| AUTO COL | Y | |||||||||||
| AUTO FLR | Y | |||||||||||
| STD COL | N | |||||||||||
| STD FLR | Y | |||||||||||
| TUBE SIZE (in.) | 1 5/8 - 2 | |||||||||||
| COLLECTOR SIZE (in.) | 2 1/2 | |||||||||||
| PORT SHAPE | OVL | |||||||||||
| Better ground clearance than D372Y | ||||||||||||
| Does not fit 4 speed applications with bell housing mounts | ||||||||||||
| Fits D-Port cylinder heads including ZZ4 crate engines | ||||||||||||
| Fits most angle plug heads | ||||||||||||
| Tri-Y design | ||||||||||||
Additional Information
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
Installation instructions
Shipping & Delivery
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 & 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
Reviews
EMISSIONS PLACARD
PerTronix Performance Ignition and Exhaust Brands use a voluntary product identification program whereby all emission 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:
PERTRONIX PERFORMANCE BRANDS EMISSIONS CODES
This product has been granted a California Air Resources Board (CARB) Executive Order (EO Number) Exemption. It is 50 State Legal when installed on the Specified vehicle per the Manufacturer’s Current Application Guide, the CARB EO, and Installation Instructions.
PERTRONIX PERFORMANCE BRANDS EMISSIONS CODES
This product is Legal for use on Pre-PoIIution Controlled Vehicles. It is legal for use on all vehicles produced Before Emissions Control Regulations were imposed. These are considered Uncontrolled Vehicles and are defined as follows
- 1965 and Older US Manufactured California Certified Vehicles
- 1967 and Older US Manufactured Federally Certified Vehicles
- 1967 and Older Foreign Manufactured Vehicles
PERTRONIX PERFORMANCE BRANDS EMISSIONS CODES
This Product is LEGAL for Closed Course Competition use or Pre-Emissions Controlled Vehicles ONLY. It is Not Legal for use on any Emissions Controlled Vehicle for Street or Off Highway use.
PERTRONIX PERFORMANCE BRANDS EMISSIONS CODES
This Product is considered а Replacement Part per CARB and EPA regulations for emissions compliance and is legal for sale and use on specified vehicles in all 50 states as stated in Manufactured's Application Guide and lnstallation Instructions.
PERTRONIX PERFORMANCE BRANDS EMISSIONS CODES
This Product is legal for Street or Off Highway use in 49 States. This product meets the EPA Anti Tampering Policy for Reasonable Basis that allows the stated vehicle to operate within the legal emissions standards in states that do not require а California EO. This product in Not Legal for Street or Off Highway use in California.
PERTRONIX PERFORMANCE BRANDS EMISSIONS CODES
This Product is Certified by the Manufacturer as being а Non-Emissions Related part per CARB and EPA regulations and therefore does not require emissions certification or CARB EO and is legal in all 50 states.
Applications
| Year / Make / Model | 1967-1969 Chevrolet C10 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967 Chevrolet C10 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 Chevrolet C10 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1969-1972 Chevrolet C10 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967-1969 Chevrolet C20 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967 Chevrolet C20 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 Chevrolet C20 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1969-1972 Chevrolet C20 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967-1969 Chevrolet C30 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967 Chevrolet C30 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 Chevrolet C30 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1969-1972 Chevrolet C30 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1969-1972 Chevrolet Blazer |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967-1969 Chevrolet C10 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967 Chevrolet C10 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 Chevrolet C10 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1969-1972 Chevrolet C10 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967-1969 Chevrolet C20 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967 Chevrolet C20 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 Chevrolet C20 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1969-1972 Chevrolet C20 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967-1969 Chevrolet K10 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 Chevrolet K10 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967-1969 Chevrolet K20 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 Chevrolet K20 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967-1968 GMC C15/C1500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967 GMC C15/C1500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 GMC C15/C1500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1969-1972 GMC C15/C1500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967-1968 GMC C15/C1500 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967 GMC C15/C1500 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 GMC C15/C1500 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967-1968 GMC C25/C2500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967 GMC C25/C2500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 GMC C25/C2500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1969-1972 GMC C25/C2500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967-1968 GMC C25/C2500 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967 GMC C25/C2500 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 GMC C25/C2500 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1969-1972 GMC C25/C2500 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967-1968 GMC C35/C3500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967 GMC C35/C3500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 GMC C35/C3500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1969-1972 GMC C35/C3500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967-1968 GMC K15/K1500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967 GMC K15/K1500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 GMC K15/K1500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967-1968 GMC K15/K1500 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 GMC K15/K1500 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967 GMC K25/K2500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 GMC K25/K2500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1967-1968 GMC K25/K2500 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 GMC K25/K2500 Suburban |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968-1972 GMC K35/K3500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1968 GMC K35/K3500 Pickup |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
| Year / Make / Model | 1970-1972 GMC Jimmy |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
|
| Notes |
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Disclaimer
Please select the applicable intended choice of installation:
- 1965 and Older US Manufactured California Certified Vehicles
- 1967 and Older US Manufactured Federally Certified Vehicles
- 1967 and Older Foreign Manufactured Vehicles
- 1966 and newer US Manufactured California Certified Vehicles
- 1968 and newer US Manufactured Federally Certified Vehicles registered
- 1968 and newer Foreign Manufactured Vehicles
Federal and state "anti-tampering" laws regulate modifications that affect emissions from motor vehicles and prohibit the sale, installation, and on-highway use of any add-on or modified emissions-related part on any pollution-controlled vehicle unless the part has received an exemption from the California Air Resources Board ("CARB"), is considered an exempt or replacement part, or we as the manufacturer have reasonable basis to know that the part does not increase emissions above the applicable standard in compliance with the EPA tampering policy. If a part has a California Executive Order Exemption (EO #) or meets the requirements for an exempt part such as a Cat Back Exhaust system or is considered a replacement part, it is legal for sale or use in all 50 states. If a part is compliant with EPA’s tampering policy, it is legal for sale or use in all states except California. We are required by law to inform you about the legality of parts that we manufacture and sell and will refuse the sale of certain parts if the following requirements are not conformed with. Use of non-compliant parts for purposes other than stated can result in a citation, fines, or the inability to register the vehicle. For the product you are attempting to add to your cart, you must certify, by clicking one of these boxes that you are using the product in the manner stated and for the application as specified by the manufacturer.
Disclaimer
Some parts are not legal for use in California or other states with similar laws/regulations regarding emissions.