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Doug's Headers D331-R 2-1/8" 4-Tube Full Length Exhaust Header for Big Block Chevrolet 68-72 Product By : Doug's Headers Sale Price : Check updated prices now

Doug's Headers D331-R 2-1/8" 4-Tube Full Length Exhaust Header for Big Block Chevrolet 68-72. Header development and design is complex and requires a substantial amount of time and resources to do the job right! Every Doug's header is tuned with the proper tube size and length to efficiently remove all the exhaust from each cylinder, reducing pumping losses resulting in a dramatic increases in horsepower and torque. Doug's headers are carefully developed on the vehicles they are intended to fit and are re-checked numerous times during the design and manufacturing process.

Features

Thick flanges (3/8 inch to 5/8 inch) with no warping

CNC mandrel bent tubes for an accurate fit and a better flow

Precision formed long transition collectors that reduces backpressure

Heavy gauge tubing (16 and 14G) for longer life

Header tubes are pre-polished for a better appearance

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