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Doug Thorley Headers

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  • List Price:
    $1,495.00
  • Our Price:
    $330.95 - $1,270.95
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(68 Reviews)
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    Features

    Description

    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

    Doug Thorley Headers Customer Reviews

    Average Rating

    68 Customer Reviews

    Good

    Appearance
    Ease of Installation
    Price/Value
    Quality

    Reviewed by Hubert B (Fayetteville, NC) — May 16, 2013 9:47 PM

    Great

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    good headers

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    Price/Value
    Quality

    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.

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    2nd part of 2001 Toyota Tacoma 4cyl 2.4cc performance upgrade

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    Ease of Installation
    Price/Value
    Quality

    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.

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    22re

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    Price/Value
    Quality

    Reviewed by Chad B (Rohnert Park, CA) Reviewed for a 1986 Toyota Pickup — Feb 07, 2013 7:38 AM

    i have not installed them yet but i loved how fast the shipping was and they were the only ones that had them in stock!!!!!!!

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    Doug thorley header 3rz

    0 of 1 people found the following review helpful.
    Appearance
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    Quality

    Reviewed by Holly S (SILVER CITY, NM) Reviewed for a 1997 Toyota Tacoma — Feb 06, 2013 8:17 PM

    Very nice can't complain would def reccommed them

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    Awesome, but you have to weld.

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    Ease of Installation
    Price/Value
    Quality

    Reviewed by Nikos P (GLEN RIDGE, NJ) Reviewed for a 2010 Chevy Camaro — Jan 02, 2013 9:28 AM

    These were the cheapest headers I could find and these are awesome for the price. Completely happy. Note that you have to weld these to the cats.

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    Shipping

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    Reviewed by Tyler M (Beaverton, OR) Reviewed for a 1983 Toyota Pickup — Dec 21, 2012 3:06 PM

    This header was exactly what I was looking for. Shipping was fast and the price was great with free shipping. I will do more business with these guys.

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    Excellent product.

    Appearance
    Ease of Installation
    Price/Value
    Quality

    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.

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    A few notes

    4 of 6 people found the following review helpful.
    Appearance
    Ease of Installation
    Price/Value
    Quality

    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!

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    2009 Nissan Xterra 2nd Generation Header Install

    5 of 6 people found the following review helpful.
    Appearance
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    Price/Value
    Quality

    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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    SUBMIT QUESTION

    Asked by Anonymous

    Sunday at 9:41 PM

    2003 Ford F-250

    1 Answer

    50 state legal ?

    are these headers California legal ?thanks

    Answers (1)

    Staff Answer

    Answered by Nathan S. — Monday at 2:05 PM

    Hi, Please see previous comment

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    Asked by Anonymous

    May 07, 2013 10:08 AM

    Toyota Tacoma

    1 Answer

    Smog, warrarnty, and wear and tear

    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

    Answers (1)

    Staff Answer

    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.

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    Asked by Anonymous

    Jul 06, 2012 8:11 AM

    1 Answer

    Magnuson Moss protection?

    Are these headers going to void my warranty?

    Answers (1)

    Staff Answer

    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.

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    Asked by Anonymous

    Jun 03, 2012 9:22 PM

    2008 GMC Sierra

    1 Answer

    2008 GMC SERRIA with a 4.8L V8

    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.

    Answers (1)

    Staff Answer

    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.

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    Asked by ky m.

    Jan 21, 2012 9:56 PM

    2012 Nissan Titan

    1 Answer

    Titan Headers

    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

    Answers (1)

    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.

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