Original Parts Group Logo
US & Canada Phone Number 1-800-243-8355
International Phone Number 1-562-594-1000
  Up to 25% Off Stereo/Sound Promotion Banner
Part fits the following years: 1965, 1966, 1967, 1968

Grand Prix Headers, Performance, by Doug's Headers

Part# DH0D521

Mfg# D521

Be the First to Review

SAVE: $77.96 Retail: $857.95

OPGI Price: $779.99


Brand: Doug's Headers
Part Type: (P) High Performance, designed to improve performance
Years: Sold As: PAIR
2015 Grand Prix Catalog Page: 258
2016 Grand Prix Catalog Page: 269


Ceramic coated

Nothing beats high-performance from Doug's!

  • NOTE1: These high-performance items are not eligible for any further discounts or promotional pricing.

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. It's a no brainer. Look no further than Doug's for your next set of headers!

326-455 with AC, PS, PB, AT and MT - floorshift only 1-3/4" tubes, 3" collector., D-Port APPLICATION: - Requires removal or modification of locking steering columns if equipped - Some factory heads do not have end bolts and should be drilled and tapped for proper sealing

Make & ModelYear RangeApplication Details
Pontiac Grand Prix1965-1968
Pontiac Catalina1965-1968
Pontiac Bonneville1965-1968
It's Arriving Soon!
Please Call 1-800-243-8355
Point Coins Earn 779 points
Switch to Mobile Site »
If you see this, please contact your IT department and ask them to unblock www.opgi-static.com