Doug's Headers D581-B Full Length Header 1-7/8In, 70-81 Firebird, Blk
- This item ships directly from the manufacturer. It may take an additional 2 business days for Dougs Headers to ship this item.
- This item ships via Ground Shipping only. Expedited and Air shipping options are not available.
Doug's PASSENGER CAR HEADERS Long Tube 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.
- 3/8" Thick machined flanges...no warping
- CNC mandrel bent tubes... accurate fit & better flow
- Precision formed long transition collectors and long tube design... reduces backpressure and increases higher RPM horsepower
- Heavy 16 gauge tubing...longer life
- Tubes are pre-polished to remove scratches and the header isfinished with a Hi-Temp Black Coating
Application1970-1979 Pontiac Firebird 5.7L/350 V8
1970-1979 Pontiac Firebird 6.6L/400 V8
1977-1979 Pontiac Firebird 6.6L/403 V8
1971-1976 Pontiac Firebird 7.5L/455 V8
- Doug's Headers D581-B 1 7/8" 4-Tube Full Length Header Pontiac Firebird 326-455 70-81 Hi-Temp Black Coating
- Collector: 3 1/2
- Port: RD
- Primary: 1 7/8
- exc. states w/Calif. emission stds
- Fits Edelbrock Performer
- Super Duty and H.O. heads only
- fits W/Milodon oil pans 30355
- removal/modification of locking steering column reqd.
- with Floor Shifter
- with A/C
- For Off-Road Use Only
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Q & A
Whether you’re looking for performance improvements or heat reduction, if you decide to wrap your headers, we'll show you the benefits and possible precautions to take before you wrap your exhaust.