reduces backpressure and increases higher RPM horsepower It does intuitively seem similar to putting a square port intake manifold on oval port heads. We told you to expect greater diversity among our feature cars, but you may not have been expecting a. 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. 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 will not compromise performance, quality or fit to compete with inferior designs at cheap prices. Doug's PASSENGER CAR HEADERS Long Tube Hi-Temp Black Coated Header development and design is complex and requires a substantial amount of time and resources to do the job right! Many manufacturers are unwilling to make the commitment and instead offer compromised headers at lower prices.
