Doug Thorley Headers

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Features

  • Doug Thorley Headers have been the cream of the performance exhaust crop since 1958
  • Custom-made for your vehicle from durable 14-gauge steel tubing for longevity and a precise fit
  • Doug Thorley Headers are available for your vehicle in one of three header styles:
  • Tri-Y Headers: Doug Thorley Tri-Y Headers feature unique engineering that properly matches your firing sequence, freeing your engine from the strain of pushing exhaust gasses. Provides power from idle through 4500 RPM
  • Shortie Headers: The easiest Doug Thorley Headers to install, these custom models are made short to fit limited space vehicles. Special care is taken to preserve emissions mounting positions for smog legality
  • Long Pipe Headers: For power in the mid to high RPM ranges, Doug Thorley Long Pipe Headers are tuned to deliver. They're the ideal pick for high-horsepower street vehicles
  • Doug Thorley Headers utilize a polished nickel chrome finish or a heavy-duty metallic ceramic coating that reduces under hood temperatures
  • Because Doug Thorley Headers are made to stringent 50 state smog law standards, all headers are available with the necessary smog equipment and mounting spots
  • Doug Thorley Headers include a model-specific gasket for a leak-free fit
  • Each model includes all necessary O2 sensor bosses for factory sensors
  • Your Doug Thorley Headers carry a Lifetime Warranty for the original owner

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. 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.

Doug Thorley Headers Customer Reviews

Average Customer Rating

   (53)
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Thorley Headers for '89 Toyota V6

Posted on 07/22/2010 by Robert Y. (Monument,CO)

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"I've had my Thorley Headers installed on my '89 Toyota Pickup for about a week now, and they are fantastic! The sound they make is truly melodious coupled with the FlowMax muffler. It took about five hours to get them on, but well worth the effort. Fitment is perfect. Not only has it increased my MPGs from 18 to 22, I can feel a definite boost in power as well. And this from an engine with almost a quarter of a million miles on it. I would absolutely recommend them to anyone considering this upgrade."

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About Robert Y.
Vehicle
1989 Toyota Pickup
Vehicle
1999 Chevy Silverado
Vehicle
1999 Subaru Legacy
I use my vehicle for
personall use
 
Sound is AWSOME!!!

Posted on 07/15/2010 by Boupha C. - 2005 Nissan X-Terra (Hampton,VA)

1 of 1 people found the following review helpful.

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"Just installed the header this weekend on my 2005 Nissan Xterra and after custom tunning and installed with gibson catback exhaust and volant CAI and TB spacer notice a major difference in power and the sound is AWSOME!!!! got a nice rumble to it not to loud though which is perfect and gas mileage went up alway a plus. If you have an Xterra or Frontier get one you wont be disapointed."

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About Boupha C.
Vehicle
2005 Nissan X-Terra
 
Excellent headers. No complaints.

Posted on 07/14/2010 by Brian M. - 2008 GMC Sierra (Springdale,AR)

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"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."

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About Brian M.
Vehicle
2008 GMC Sierra
I use my vehicle for
commuting, towing, off-roading, travel, hauling
 
doug thorley shortys for 06 toyota tundra 4.7

Posted on 06/27/2010 by Josh H. (Jonesboro,AR)

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Quality

"If it wont kill you to dish out the money i would recommend these headers. I gained a consistent 2 mpg better, accelleration seemed to be smoothed out, definatly winds through the rpms quicker now, didnt lug at lower rpms like it used too. Didnt make exhaust very much louder at all that i noticed as i already had a custom cat back exhaust...just changed the exhaust note, a little more aggressive...seems that you can hear individual cylinders firing....i feel more low end torque for sure......I LOVE THESE HEADERS!!"

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About Josh H.
Vehicle
2003 Mitsubishi Galant
Vehicle
2006 Toyota Tundra
I use my vehicle for
commuting, and towing
 
SHORTY HEADERS 2010 CAMARO

Posted on 11/25/2009 by Daniel T. - 2010 Chevy Camaro (Carencro,LA)

3 of 7 people found the following review helpful.

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Quality

"I HAVE READ MANY REVIEWS BEFORE MAKING MY CHOISE, I AM PLEASED WITH THE HEADERS THANKS DANNY."

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About Daniel T.
Vehicle
2010 Chevy Camaro
I use my vehicle for
GOING TO WORK AND DRIVING TO CAR SHOWES
 
3vze Thorley Headers

Posted on 11/19/2009 by Jeff C. - 1994 Toyota 4-Runner (Los Angeles,CA)

0 of 5 people found the following review helpful.

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Quality

"These Thorley Headers weigh twice of what my Downy Offroad (RIP) headers weighed due to more robust materials. They are only a week old so time will tell."

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About Jeff C.
Vehicle
1994 Toyota 4-Runner
I use my vehicle for
work, ski. and camping
 
Sweet Headers

Posted on 10/15/2009 by Randy B. - 2003 Ford F-250 (Bakersfield,CA)

6 of 7 people found the following review helpful.

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Quality

"These are a very nice set of headers, I removed a set of headers I purchased off of Ebay for my Ford V10 and I installed the Thorley headers I gained 5mph on a 7% grade. I love the sound and the horse power gain. I recomend them to any one."

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About Randy B.
Vehicle
2003 Ford F-250
I use my vehicle for
commute to work and vacations with my toy hauler
 
DOUG THOURLEY HEADERS

Posted on 10/01/2009 by Rollie N. (Edinburg,TX)

0 of 4 people found the following review helpful.

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"I RECENTLY RECEIVED MY D/T HEADERS AND I HAVE YET TO EXPERIENCE SOME HORSEPOWER BUT I KNOW IT CHANGED MY SOUND A LITTLE DEEP AND SAVED SOME GAS EVEN THOUH I GOT A HEAVY FOOT IF AT ANY TIME MY LITTLE EXTRA HORSEPOWER KICKS IN IT WOULD HAVE BEEN A GREAT INVESTMENT."

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About Rollie N.
 
Pretty good

Posted on 09/23/2009 by John P. - 2010 Chevy Camaro (Staten Island,NY)

4 of 6 people found the following review helpful.

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Quality

"good design, straight foward install, just wish they came with a CARB EO number welded on the headers. They really shouldnt say 50 state legal, if it doesnt come with one of those."

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About John P.
Vehicle
2010 Chevy Camaro
I use my vehicle for
shows and daily driving
 
They'rrrrrre Great!

Posted on 09/14/2009 by Jeremy H. - 2010 Chevy Camaro (Bountiful,UT)

3 of 3 people found the following review helpful.

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Price/Value
Quality

"Easy to install, noticed a difference in performance, not much difference in sound (with everything else complete stock). Would buy again!"

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About Jeremy H.
Vehicle
2010 Chevy Camaro
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