Doug's Headers

D670S4R

Doug's Headers D670S4-R 1-3/4 4-Tube Full Length Exhaust Header for Ford Mustang 351C 67-70

EAN: 0694342510794

UPC: 694342510794

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 for a better appearance

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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