Headers, Dougs, 1964-67 Pontiac 326-455 D-Port, 1-3/4", Full Length

Nothing beats high-performance from Doug's!

What is the main thing you look for when shopping for a new set of headers? Performance of course! And with Doug's, you've got it. You'll also get the ease-of-installation and a great selection of applications for all years. Doug's headers feature heavy-wall construction with 3/8"-thick mounting flanges, ensuring durability and longevity under the most demanding circumstances. All of the necessary mounting hardware is included with each set: Bolts, gaskets and reducers. NOTE: D-Port headers do not fit Edelbrock D-Port heads. Due to the configuration of the exhaust ports, you must use Doug's round port headers. Doug's D-Port headers are for factory Pontiac heads.

All headers are for power brake and power steering applications. APPLICATION FOOTNOTES: 93. Requires removal or modification of locking steering columns if equipped 104. Some factory heads do not have end bolts and should be drilled and tapped for proper sealing 132. Fits Edelbrock “Performer,” Ram-Air, Super-Duty and H.O. heads only 134. 4-Speed applications must use OE 64-65 Z-Bar part# 9776376 136. Application with scatter shield or dual-starter bellhousing must use Fram oil filter part# PH3675 180. Requires use of LS1 adapter plate kit 181. Includes 3" to 2-1/2" reducers with O2 fittings 190. TH400 applications must use shorter aftermarket modulator valve (2-3/4" Long) 191. Headers fit with the following Milodon oil pans: 30355, 31660, 31665