Long Tube Headers for 64-72 GM A Body 4.8-6.2L LS Engine Swap D3336

Overview:64-72 GM A Body LS Long Tube Silver CtdLong 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.Features: 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 Specs: Brand: Doug's Headers Collector Attachment: V-Band Collector Diameter: 3.0 IN Collector Port Diameter: 3.0 IN Cylinder Head Port Shape: Round Design: Full-length EGT Port: No Finish: Metallic Ceramic Coated Flange Thickness: 0.375 IN 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: Yes Port Shape: Round Primary Tube Outside Diameter: 1.75 IN Primary Tubing Diameter: 1.75 IN Prop 65 (C, R or CR): CR Prop 65 Yes/No: Yes Sheen Level: Semi-Gloss Title: Doug's Long Tube Header 64-72 GM A Body 4.8-6.2L LS Engine Swap 1 3/4" Primary 3" Collector Black Hi Temp Coated D3336-B Tube Wall Thickness: 16 GU Part Number: D3336 Emissions: 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. Instructions:Click here for installation instructions!Fitment Notes: For use with GM LS Engine Swap only Includes O2 sensor extension harness. Requires Doug's LS1 adapter plate kit P/N SK100 or equivalent. Will not fit manual transmission cars with factory Z bar clutch linkage.