Doug's Headers - D581-B
Doug's Headers D581-B 1 7/8" 4-Tube Full Length Header Pontiac Firebird 326-455 70-81 Hi-Temp Black Coating
Doug's Headers D581-B 1 7/8" 4-Tube Full Length Header Pontiac Firebird 326-455 70-81 Hi-Temp Black Coating
Features & Benefits
Features & Benefits
- 3/8" Thick machined flanges to prevent warping
- Precision formed long transition collectors and long tube design reduces backpressure and increases higher RPM horsepower
- Heavy duty 16-gauge tubing for long life
- Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating
Long tube headers provide the greatest increases in horsepower and torque across the entire RPM spectrum. The choice of racers worldwide, Doug's long tube headers are designed for the car owner who wants maximum power and the highest quality header on the market.
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
Specifications
| Finish | Hi-Temp Black Coating |
|---|---|
| Material | Steel |
| Design | Full-length |
| Primary Tubing Diameter | 1.875 IN |
| Collector Port Diameter | 3.5 IN |
| Port Shape | Round |
| 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
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.
- Once an item has tracking info, it cannot be cancelled. If you decide you don’t want the items after shipment, please take receipt of the item and process it via our return policy. Thank you for understanding!
Returns, Replacements & Warranty
Returns, Replacements & Warranty
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.
Warranty
All Doug's headers and exhaust products are guaranteed, to the original purchaser, to be free of defects in materials and workmanship for one year. This warranty covers the replacement or repair of the product only and does not cover the cost of removal and installation, customer applied aftermarket coatings or any other discoloration or corrosion of finished surfaces. Damage or product failure resulting from collision,improper installation, off-road use, road hazards, the use of exhaust insulting wrap or like products or rust occurring after installation, is not covered by the warranty. Should a part become defective it should be returned to the original selling retailer and must be accompanied with the original sales receipt. If there is no retailer in your area, call the factory for a return authorization and return your part prepaid to the factory for inspection. PerTronix reserves the right to replace or repair the alleged defective part and return the part freight collect.
Reviews
Reviews
Doug's Headers - D581-B
Doug's Headers D581-B 1 7/8" 4-Tube Full Length Header Pontiac Firebird 326-455 70-81 Hi-Temp Black Coating
Doug's Headers D581-B 1 7/8" 4-Tube Full Length Header Pontiac Firebird 326-455 70-81 Hi-Temp Black Coating
- Free shipping on $99+ orders in lower 48 states
- 90-day return policy
- We’re here to help! Call us on 909-599-5955
Similar Products
Doug's Headers D581-B 1 7/8" 4-Tube Full Length Header Pontiac Firebird 326-455 70-81 Hi-Temp Black Coating
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EMISSIONS CODE
What does this emissions code mean?
Features & Benefits
Features & Benefits
- 3/8" Thick machined flanges to prevent warping
- Precision formed long transition collectors and long tube design reduces backpressure and increases higher RPM horsepower
- Heavy duty 16-gauge tubing for long life
- Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating
Long tube headers provide the greatest increases in horsepower and torque across the entire RPM spectrum. The choice of racers worldwide, Doug's long tube headers are designed for the car owner who wants maximum power and the highest quality header on the market.
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
Specifications
| Finish | Hi-Temp Black Coating |
|---|---|
| Material | Steel |
| Design | Full-length |
| Primary Tubing Diameter | 1.875 IN |
| Collector Port Diameter | 3.5 IN |
| Port Shape | Round |
| 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
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.
- Once an item has tracking info, it cannot be cancelled. If you decide you don’t want the items after shipment, please take receipt of the item and process it via our return policy. Thank you for understanding!
Returns, Replacements & Warranty
Returns, Replacements & Warranty
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.
Warranty
All Doug's headers and exhaust products are guaranteed, to the original purchaser, to be free of defects in materials and workmanship for one year. This warranty covers the replacement or repair of the product only and does not cover the cost of removal and installation, customer applied aftermarket coatings or any other discoloration or corrosion of finished surfaces. Damage or product failure resulting from collision,improper installation, off-road use, road hazards, the use of exhaust insulting wrap or like products or rust occurring after installation, is not covered by the warranty. Should a part become defective it should be returned to the original selling retailer and must be accompanied with the original sales receipt. If there is no retailer in your area, call the factory for a return authorization and return your part prepaid to the factory for inspection. PerTronix reserves the right to replace or repair the alleged defective part and return the part freight collect.
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 | 1970-1979 Pontiac Firebird |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
Liters: 6.6 Cubic Inches: 350, 400 |
| Notes |
|
| Year / Make / Model | 1971-1976 Pontiac Firebird |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
Liters: 7.5 Cubic Inches: 455 |
| Notes |
|
| Year / Make / Model | 1977-1979 Pontiac Firebird |
|---|---|
| Engine Type | V8 |
| Engine Size(s) |
Liters: 6.6 Cubic Inches: 403 |
| 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.