Doug's Headers

D303YR

Doug's Headers D303Y-R 1-3/4 Tri-Y Exhaust Header for Big Block Chevrolet 68-87

EAN: 0694342506995

UPC: 694342506995

Headers

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 better appearance

Doug's 2WD Truck Headers 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.

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