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Dynomax Thrush Header Back Kit 1967-72 GM C-Series Pick-up


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Thrush Header Back Kit 1967-72 GM C-Series Pick-up
Oversize Fee:$19.99
Thrush Header Back Kit
  • 1967-72 GM C-Series Pick-up with Trailing Arms
  • Not Compatible with Leaf Spring Suspensions
  • Dual Mufflers
  • 2.5'' Diameter
  • Ships on 12/21/23

    Thank you! We will notify you when this product becomes available.


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    89027 - Thrush Header Back Exhaust Systems is rated 3.0 out of 5 by 7.
    Rated 5 out of 5 by from Fit well, even with leaf springs I bought this for my son's 68 GMC longbed, with leaf springs. The instructions said it would only fit coil springs, but we tried it anyhow. Without any modifications it fit!
    Date published: 2018-12-28
    Rated 5 out of 5 by from Nice!!!! Exhaust system comes poorly packaged and FedEX denied delivery twice. Had poor customer service the second time I called JEGS about the issue. Exhaust system fits great on 71 C10 long bed with Headers. Best price I was able to find for a bolt on exhaust system header back. Sound is somewhat quiet at idle but opens up when at full throttle. I can still have a conversation in cabin at cruising speed with no annoying drone.
    Date published: 2018-03-26
    Rated 4 out of 5 by from Slight fitment issue, Good sound. Pretty happy Fairly straightforward to install, all needed hardware was included, although I did opt for aluminum collector gaskets because I have never had much luck with paper ones like came with this kit. My only complaint is that the bend over the axle housing on the passenger side should have been further rearward. This may be due to the collector on my header on that side being angled slightly downward, but I couldn't cheat the joints enough to get proper clearance over the axle on that side. I can see contact marks on the pipe and the axle housing, but it doesn't hit hard enough for me to hear it while driving (maybe it only happens when I pull my trailer, which clangs, bangs, and squeaks enough to obscure just about any noise).The sound is much quieter and more pleasant than the 2" pipes w/ flowmasters dumped in front of the rear axle that this system replaced.
    Date published: 2023-10-11
    Rated 3 out of 5 by from Good Quality, Poor Packaging! I purchased this system and when I recieved it, the box was ripped and destroyed, all the accessories that were or should have been in a bag or box separately within the main box, was non-existent! Nuts and bolts where everywhere, clamps were just scattered about and to the point of me almost returning the whole dam thing! It took me 4 hours to match up all parts and pieces regarding nuts, bolts, clamps and hangers. There were no instructions as described, either! The quality of the system was perfect though!
    Date published: 2020-02-21
    Rated 2 out of 5 by from Missing many pieces I bought this online, shipped to me at home. Those two steps were awesome. Delivered to my mechanic and he informed me that many little parts were missing and one of the two mufflers were missing. Very disappointed!
    Date published: 2020-03-30
    Rated 1 out of 5 by from Trailing arm application only!! I bought this for my '70 Chevy Longhorn along with other items. After opening the box and looking at the enclosed paperwork it stated that it would only work on a trailing arm truck and it was not for a leaf spring truck. I'll keep it and alter it to fit instead of costing me more time and money that they should of put it in their listing instead of letting the customer find out after the purchase. The kit is top quality and I would recommend it for someone who has the truck with trailing arms.
    Date published: 2018-11-07
    Rated 1 out of 5 by from Suck Terrible fit I’d been better off buying a universal kit an building it from scratch because that’s what I had to do with this kit.
    Date published: 2018-04-04
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    Do you have this kit in stock today?

    Asked by: Merle
    Yes! we do have one kit instock right now.
    Answered by: BrandonJ
    Date published: 2018-04-28

    Are they still making this exhaust kit. It's been out of stock a while

    Asked by: Russel
    Yes they do, but you must phone the order in to a tech @ 800-345-4545 ext. 3480
    Answered by: SteveM
    Date published: 2017-08-27
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