Doug Thorley Headers Customer Reviews
68 Customer Reviews
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It was the late 1950s, during the golden era of hot rods, when Doug Thorley crafted his plans for the highest quality headers on the block. Fine tuning, superior craftsmanship and unmatched attention to detail helped Doug Thorley Headers power street racers everywhere.
Now 50 years later, Doug Thorley Headers are built with the same mission in mind: amping-up the power of your street ride. Thorley Headers use one of three souped-up designs: a unique Tri-Y setup that roars from idle up to 4500 RPM; shortie headers for ease of installation and smog compliance; and long tube headers that specialize in mid to high RPM power.
Because they're setup for the streets, Thorley Headers also feature the hardware and custom flanging to be 50-state smog legal (some shortie applications). Each header includes a sharp nickel chrome finish that's polished to a sweet gleam, or a metallic ceramic coating that withstands high heat. And, your Doug Thorley Headers carry a Lifetime Warranty for the original owner.
Our 50+ Doug Thorley Headers customer reviews have an average rating of 4.50 out of 5 stars. To see specific reviews about your vehicle, please select your year, make and model from the drop down above.
Thanks to the Magnuson Moss Warranty Act: US Code – Title 15, Chapter 50, Sections 2301-2312, your vehicle’s factory warranty is protected by law when you add aftermarket parts. Details
68 Customer Reviews
Reviewed by kai l (VENTURA, CA) Reviewed for a 2012 Toyota Tacoma — May 13, 2013 10:02 PM
Overall I'm impressed. The installation will require right tools and donut ring gasket t exhaust pipe for Toyota Tacoma 2.7 2012. Definately helps with acceleration! Make sure to drive vehicle hard after install, and re tighten torque header.
Reviewed by Robert E (Arroyo Grande, CA) Reviewed for a 2001 Toyota Tacoma — Apr 08, 2013 2:12 PM
Great fit, easy to install apart from one bottom flange nut. The one closest to the firewall cannot be tightened with a deep socket. I could only fit a combination wrench in the space available and had to guess the torque. Also welding flash on plates. After install I noticed improved top end performance. A good header that could use some modifications and better quality control.
Reviewed by Alex P (New Port Richey, FL) Reviewed for a 2004 Nissan Frontier — Oct 26, 2012 4:47 AM
I am very happy with great deal I received when buying these headers. The packaging was very well put together. Included everything except the manifold gaskets. Easier to install than I had expected. I also used a lift and air tools so that helped. They are supposed to be ceramic coated so we will see how long the finish lasts.
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 michael c (Allentown, NJ) Reviewed for a 2006 Chevy Silverado — Apr 24, 2012 10:44 AM
Overall I am very pleased with the Doug Thorley headers. I consider myself a competent do it yourselfer and here's my take on the DT headers. The finish of the materials is of good enough quality. The face on the header where the exhaust manifold gasket sits had machining marks. I would liked to have this surface finished smooth. The exhaust ports were rough ground out and not polished smooth. One collector wasn't exactly centered on the catalytic flange before it was welded. One of the exhaust tubes was not ground flush after welding it to another. I would correct these issues if I were using these headers for competition. The finish of the chrome and ceramic was great. No increase in exhaust noise after installation. After the install, I noticed more low end torque and pickup! Yes, I would recommend DT header for your Xterra.
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Asked by Anonymous
Sunday at 9:41 PM
2003 Ford F-250
are these headers California legal ?thanks
Answered by Nathan S. — Monday at 2:05 PM
Hi, Please see previous commentflag Accept Answer
Asked by Anonymous
May 07, 2013 10:08 AM
I was thinking about getting the long tubes on my 2012 tacoma and was wondering if (1) i will be able to pass CA smog testing (CARB), (2) if putting them on will void my warranty with toyota, and (3) if there are any negative wear and tear affects to after market headers. Thanks
Answered by Nathan S. — May 08, 2013 9:42 AM
Hi, Ok, long tube headers generally will not be legal in California as they move the oxygen sensors and catalytic converters out of their factory position which "in theory" will effect emissions in a negative way. Shorty headers are your best bet for a street-legal setup and will be far more beneficial if the truck is a daily driver. Second point, according to the Magnuson Moss Warranty Act, a vehicle manufacturer cannot void the warranty of your vehicle due to an aftermarket part unless they can prove that the aftermarket part was the cause or contributed to the failure of the vehicle (15 U.S.C. 2302(C)). It’s always best to work with a performance-oriented dealership, but no matter who you choose, you’re protected by the law. Final point, quality headers will last every bit as long as factory exhaust manifold (most new cars basically have tubular headers but the manifold title stuck around). The only potential issue I see is using long tube headers for a daily driver. Long tubes make power in the mid to upper rpm range where most street driving isn't done. You're going to have to rev the weee out of your truck to take advantage of the design and will lose low-end torque until you get there. Higher RPMs will generate more engine wear as well.flag Accept Answer
Asked by Anonymous
Jul 06, 2012 8:11 AM
Are these headers going to void my warranty?
Answered by Elizabeth C. — Jul 06, 2012 12:22 PM
No,the Magnuson Moss Warranty Act states that your vehicle’s factory warranty is protected by law when you add aftermarket parts. Check it out here: Magnuson Moss Warranty Act.flag Accept Answer
Asked by Anonymous
Jun 03, 2012 9:22 PM
2008 GMC Sierra
I'm looking for headers for my truck, and I'm looking for shorty headers that deliver power and raw sound. I don't know whether to go with JBA or Doug Thorley. I already have a K&n air filter and a Flowmaster Super 10 series stainless steel muffler. Thank you.
Answered by Nathan S. — Jul 06, 2012 8:30 AM
My personal favorite would be the Doug Thorley headers. The build quality is unbeatable, with thick gauge tubing and flanges to prevent cracking and to provide a great seal against the cylinder heads. The headers won't change the exhaust tone too much but a cat back system such as Flowmaster's American Thunder exhaust certainly will give you just the tone you are looking for. I see that you swapped your factory muffler for a Flowmaster which did help. The only problem is that the piping in the factory exhaust exhaust system does not flow very well due to the small diameter and poor bends which create wrinkles. The American Thunder kit will most likely be offered in either 2.25" or 2.5" smooth mandrel bent tubing with 40 or 50 series mufflers if you decide on a dual exhaust.flag Accept Answer
Asked by ky m.
Jan 21, 2012 9:56 PM
2012 Nissan Titan
I have a Titan 2012 I wonder if there any after market headers for my truck. I preferred a Doug Thorley Headers stainless steel. Thank you.. Nissan Titan 012 crew sl 4x4
Answered by Kelly O. — May 11, 2012 11:34 AM 2011 Nissan Titan
I have a 2012 too, and i'm looking into these as well. They are listed to fit 2011 so I don't see why they won't fit ours.flag Accept Answer