Long Tube Headers for 67-69 F Body/68-74 X Body 265-400 SBC D323-B

Overview:67-69 F Body/68-74 X Body SBC Long Tube Black Ctd 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.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: 3-Bolt Flange Collector Diameter: 3.5 IN Collector Port Diameter: 3.5 IN Color: Black Cylinder Head Port Shape: Rectangular Design: Full-length EGT Port: No Finish: Hi-Temp Black Coating 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: No Port Shape: Rectangular Primary Tube Outside Diameter: 1.875 IN Primary Tubing Diameter: 1.875 IN Prop 65 (C, R or CR): CR Prop 65 Yes/No: Yes Sheen Level: Matte Title: Doug's Long Tube Header 67-69 F Body/68-74 X Body 265-400 SBC 1 7/8" Primary 3 1/2" Collector Black Hi Temp Coated D323-B Tube Wall Thickness: 16 GU Part Number: D323-B Applications: 1968-1968 Chevrolet Chevy II 307 CID 1968-1968 Chevrolet Chevy II 327 CID 1968-1968 Chevrolet Chevy II 350 CID 1967-1969 Chevrolet Camaro 327 CID 1967-1969 Chevrolet Camaro 350 CID 1967-1969 Chevrolet Camaro 302 CID 1969-1969 Chevrolet Camaro 307 CID 1969-1974 Chevrolet Nova 350 CID 1969-1973 Chevrolet Nova 307 CID 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: Fits most angle plug heads without Air Conditioning Fits 67-69 Firebird with 265-400 Small Block Chevrolet Engine Swap, Fits most angle plug heads, without Air Conditioning