Doug’s Headers D3351-B – Doug’s Long Tube Header 75-81 GM F Body 4.8-6.2L LS Engine Swap 1 7/8″ Primary 3″ Collector Black Hi Temp Coated

Headers – Full Length – 1.875 in Primary – 3 in Collector – Gaskets / Hardware Included – Steel – Black Paint – GM LS-Series – GM F-Body 1975-81 – Pair

Doug’s Long Tube Header 75-81 GM F Body 4.8-6.2L LS Engine Swap 1 7/8″ Primary 3″ Collector Black Hi Temp Coated D3351-B

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.This fitment is tailored for popular aftermarket engine swap kits. Doug’s engine swap headers were developed to solve common fitment issues in tight spaces, making your swap process smoother. No more guesswork or modifications needed – just straightforward installations that save you time and frustration.

• 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: V-BandCollector Diameter: 3.0Collector Port Diameter: 3.0Color: BlackCylinder 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: Hi-Temp Black CoatingFlange Thickness: 0.375Gasket Or Seal Included: YesGaskets Included: YesGrade Type: PerformanceHeader Material: SteelHeader Style: Full-lengthMaterial: SteelMounting Hardware Included: YesOxygen Sensor Port: YesPort Shape: RoundPrimary Tube Outside Diameter: 1.875Primary Tubing Diameter: 1.875Sheen Level: MatteTube Wall Thickness: 16