Doug's Headers D590-R 1 3/4" 4-Tube Full Length Header Pontiac GTO 326-455 68-72 Raw Steel
3/8" Thick machined flanges...no warping
CNC mandrel bent tubes... accurate fit & better flow
Precision formed long transition collectors and long tube design... reduces backpressure and increases higher RPM horsepower
Heavy 16 gauge tubing...longer life
Tubes are pre-polished to remove scratches and the header is left unfinished (raw steel) for individual customizing
Doug's STANDARD(-R) Headers come to you with a RAW Finish (No Coating) ready for your paint or your heat barrier coating.