Pontiac 1964-1972 326-455 GTO, Lemans Round Port Headers 1 7/8" Pipe, 3 1/2" Collector (Raw No Coating) *Man. Trans. Cars Must Use 1964-65 Z-Bar/GM# 9776376 APE-R166K*
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.