Doug’s Headers D581 – 1 7/8″ 4-Tube Full Length Header Pontiac Firebird 326-455 70-81 Metallic Ceramic Coating

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 FlangeCollector Diameter: 3.5Collector Port Diameter: 3.5Color: SilverCylinder Head Port Shape: RoundDesign: Full-lengthEGT Port: NoEmissionFullDES: 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 CoatedFlange Thickness: 0.375Gasket Or Seal Included: YesGaskets Included: YesGrade Type: PerformanceHeader Material: SteelHeader Style: Full-lengthMaterial: SteelMounting Hardware Included: YesOxygen Sensor Port: NoPort Shape: RoundPrimary Tube Outside Diameter: 1.875Primary Tubing Diameter: 1.875Sheen Level: Semi-GlossTube Wall Thickness: 16