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

  (38)
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Excellent!

Posted on 11/27/2006 by Brad S. (Franklin,OH)

1 of 1 people found the following review helpful.

"These headers really helped wake up the bottom end of my truck. Construction and finish are excellent. These are probably the best header out there for a 4x4 truck that needs all the low end torque they can get. The 310Y is a long tube headers and gives you the best power band, better than the newer midlength model."

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About Brad S.
 
decent

Posted on 11/26/2006 by Travis H. (Snohomish,WA)

1 of 1 people found the following review helpful.

"instalation was a bitch, drive line doesnt fit back on without any costomizing on a 1978 f250 with a 460 but other than that they look and sound great"

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About Travis H.
 
GREAT HEADERS

Posted on 10/31/2006 by Richard P. (Foster City,CA)

1 of 1 people found the following review helpful.

"VERY NOTICEABLE INCREASE IN HP & PERFORMANCE. A GREAT PURCHASE."

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About Richard P.
 
great way to wake up a sleeping bear

Posted on 10/20/2006 by Paul J. S. (Sandusky,OH)

1 of 1 people found the following review helpful.

"Easy installation,good quality parts, look great. The idle quality is greatly improved,more low end throttle response,increased fuel economy. And the best id the GREAT SOUND! Deeper more defined rumble without a drone at speed that will drive you nuts!"

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About Paul J. S.
 
Great Headers

Posted on 10/17/2006 by Chris C. (Elmendorf Afb,AK)

1 of 1 people found the following review helpful.

"Great product, increased power, acceleration, and fuel economy"

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About Chris C.
 
Grandma could do it, that easy.

Posted on 09/01/2006 by Carolyn F. B. - 2007 Dodge Ram (Norfolk,VA)

"very easy install, great looks and perfomance gains"

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About Carolyn F. B.
Vehicle
2007 Dodge Ram
I use my vehicle for
Everything
 
Doug Thorley Headers

Posted on 07/21/2006 by Brennen C. (Port Coquitlam,BC)

0 of 1 people found the following review helpful.

"Awesome"

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About Brennen C.
 
Perfect fit

Posted on 07/20/2006 by Michael C. (University Place,WA)

1 of 1 people found the following review helpful.

"Perect fit. Looks great a they preform excellent!! Nothing but great comments from people. Can,t beat the price, quality or free fast shipping!"

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About Michael C.
 
good stuff for the price

Posted on 05/19/2006 by Carlos C. (Hamilton,OH)

1 of 1 people found the following review helpful.

"easy to install,good performance horsepower..i really join"

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About Carlos C.
 
Hard to beat!

Posted on 04/19/2006 by Anthony C. (San Antonio,TX)

1 of 1 people found the following review helpful.

"This is my 2nd set of these, the quality, fit and finish is top notch. Definately one of the best headers for the 5.7 Vortec, if not the best. Recommended to buy copper gaskets and use lock washers instead of the washers that come supplied."

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About Anthony C.
 
94 Chevy K1500 ,6in lifted, Thorley headers TriY

Posted on 03/29/2006 by Mark A. (San Diego,CA)

1 of 1 people found the following review helpful.

"Simply put AWESOME. First of all the craftsmanship on the header itself was high quality. Welds were top notch. All 3 parts: 2 headers and a tri-y connector pipe bolted up perfectly (except I had to cut about 2 inches of of the driver side "U" pipe to clear the extra suport bar for the 6inch RCD lift kit). Other than that one fabrication issue, the system when on great with plenty of clearence to all other engine parts. I run a Bullet high flow cat back with Thorey headers and it sounds deep and sweet. I definetly notice a few heads turn now when I am at the gas station. As for performance: the increased torque is huge, made a big difference. I got more roll back and much better throttle response. Gas mileage is to be determined. I just filled up and so far so good. No number to report just yet. I researched headers for a year before going with thorley and I completely satisfied with my decision."

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About Mark A.
 
Thorley headers Dodge Powerwagon

Posted on 02/07/2006 by Larry G. (Payson,AZ)

1 of 1 people found the following review helpful.

"These headers were relatively easy to install but the right output nad to have a special exhaust piece hand made to clear part of the cross member. They gave a noticeable increase in low end power and response. More than worth the bit of extra work to clear the crossmember angle brace."

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About Larry G.
 
heavy duty

Posted on 01/30/2006 by Glenn G. (Lewiston,ID)

2 of 2 people found the following review helpful.

"These are by far the heaviest headers I have ever seen. The quality is superb and they look like they should last forever. The crossover pipe is included and equal quality as well as the gaskets. Not the tin pipes I'm used to seeing."

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About Glenn G.
Showing 26 - 38 of 38 Customer Reviews
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