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Doug Thorley Headers Part #THY-309-C Customer Reviews
5 Customer Reviews
Reviewed by Kenneth E (Colorado Springs, CO) Reviewed for a 2004 Chevy Suburban — Nov 06, 2013 8:18 AM
Well let me start by saying that after sending the second set of BBK headers back because they leaked. I order a set of Doug Thorley Headers. and right out of the box I seen that the weld was much better, it went all the way around the each tubes inside and out, I like the sound of these headers and more power towing up hills. as far as gas saving.I can't tell because I can't seem to keep my foot off the gas. So don't Buy BBK header they leak!Doug Thorley are the way to go.
Reviewed by Matt B (Reading, PA) Reviewed for a 2006 Chevy Silverado — Jun 04, 2012 1:19 PM
Beautiful finish, and exceptionally well manufactured. However, the gaskets they shipped were junk. Like, didn't last a week junk! Other than that, well-worth the price, and AutoAnything was a breeze to work with!
Reviewed by Brian M (Springdale, AR) Reviewed for a 2017 Chevy SS — Jul 14, 2010 5:02 PM
On my 2008 GMC Sierra Denali, these fit perfectly. The improvement in power was immediately noticeable. Better throttle response with faster revving with much more rapid acceleration. I had several other mods already on the truck (CAI, cat-back exhaust, programmer), but this one piece really pulled it all together. I'm not sure if the improvement would have been quite as dramatic without those others in place, but whatever the reason, this single component made a marked improvement. Aesthetically, these are very good looking ceramic-coated headers. They take up considerably less room than the stock headers, especially since they don't need the heat shields. They permit more of the internal engine sounds to escape as well, which adds a nice mechanical aspect to compliment the V8 rumble out the back. Installation will vary depending on the truck, and will probably require a lift.
Reviewed by Andrew G (Fontana, CA) Reviewed for a 2006 Chevy Silverado — Sep 13, 2007 12:02 AM
These headers improved all around performance on my silverado. If I even buy another truck or car the first thing im go to get is another set of these headers.
Ships Between 9/25 - 9/27
- What Do You Drive?
- Style:Ceramic Coating
- Part #:THY-309-C
- Dual Header Exit
- Mild Steel
- Tube Size: 1 5/8"
- Collector Size: 2 1/2"
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