Doug's Headers - D581
Headers - Full Length - 1.875 in Primary - 3.5 in Collector - Gaskets / Hardware Included - Steel - Ceramic - Pontiac V8 - GM F-Body 1970-79 - Pair
Doug's Long Tube Header 70-81 Firebird 455 W/HO/SD/Ram Air Heads only 1 7/8" Primary 3 1/2" Collector Silver Ceramic Coated D581
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.
- 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
Collector Attachment: 3-Bolt Flange
Collector Diameter: 3.5
Collector Port Diameter: 3.5
Color: Silver
Cylinder Head Port Shape: Round
Design: Full-length
EGT Port: No
EmissionFullDES: 3 - 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.
Finish: Metallic Ceramic Coated
Flange Thickness: 0.375
Gasket Or Seal Included: Yes
Gaskets Included: Yes
Grade Type: Performance
Header Material: Steel
Header Style: Full-length
Material: Steel
Mounting Hardware Included: Yes
Oxygen Sensor Port: No
Port Shape: Round
Primary Tube Outside Diameter: 1.875
Primary Tubing Diameter: 1.875
Sheen Level: Semi-Gloss
Tube Wall Thickness: 16
