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

  (30)
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Ease of Installation Ease of Installation
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Doug's is the best

Posted on 02/16/2008 by Jeff T. - 2000 Chevy Silverado (Kokomo,IN)

5 of 7 people found the following review helpful.

"Good horsepower increase, Great throtle response. Good product."

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About Jeff T.
Vehicle
2000 Chevy Silverado
I use my vehicle for
General use
 
thorley headers

Posted on 02/02/2008 by Edna F. - 2002 Ford F350 (Glendale,CA)

5 of 7 people found the following review helpful.

"great sound. you can feel the power"

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About Edna F.
Vehicle
2002 Ford F350
 
Great sound and power gain!

Posted on 01/30/2008 by Deloris W. (Riddle,OR)

3 of 6 people found the following review helpful.

"These headers give you an excellent gain in HP, but in the jeep grand cherokees, it is a VERY tight fit on the passenger side."

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About Deloris W.
 
Great header!

Posted on 12/04/2007 by Tavis B. - 1971 Chevy Corvette (Winston-Salem,NC)

5 of 7 people found the following review helpful.

"High quality and look great!"

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About Tavis B.
Vehicle
1971 Chevy Corvette
I use my vehicle for
Fun
 
Tri-Y Headers

Posted on 12/01/2007 by Jason D. - 1970 Chevy Chevelle (Bowie,MD)

5 of 7 people found the following review helpful.

"These are very nice headers, nice thick flanges and great welds."

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About Jason D.
Vehicle
1970 Chevy Chevelle
I use my vehicle for
Cummuting, racing, car shows.
 
Seattle WA

Posted on 10/19/2007 by William L. - 1992 Chevy Truck 2500 (Seattle,WA)

7 of 9 people found the following review helpful.

"Outstanding constrouction fit and finish. Instalation instructions and hardware are great with nothing missed. When I learn to keep my foot of the Power fun meter I hope to see some milage improvement. Big inprovement in everyday driveability and power. spend the extra and get the ceramic coating well worth the extra cost."

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About William L.
Vehicle
1992 Chevy Truck 2500
I use my vehicle for
Commuting, towing water ski boat, skiing
 
Doug Thorley headers

Posted on 10/05/2007 by Shawn C. - 1994 Nissan Pathfinder (Winnetka,CA)

3 of 5 people found the following review helpful.

"Great service ,fast shipping, Doug Thorley is nothing but quality. Great product."

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About Shawn C.
Vehicle
1994 Nissan Pathfinder
I use my vehicle for
All terrian
 
Doug Thorley Headers

Posted on 09/13/2007 by Andrew G. (Fontana,CA)

4 of 6 people found the following review helpful.

"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."

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About Andrew G.
 
Great Torque Header

Posted on 08/23/2007 by Eric H. (Lakeside,CA)

2 of 4 people found the following review helpful.

"The Doug Thorley header ads some extra MPH to the top end of my powerband,but where i notice the most difference is the torque it puts out coming through the gears.With brand new 31" BF Goodrich All Terrains,she lays down the rubber much easier now.It sounds much better too."

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About Eric H.
 
73 chev 2w drive pu.

Posted on 08/17/2007 by Bruce J. (Enumclaw,WA)

2 of 5 people found the following review helpful.

"very happy with product finish is very good fit was great,passenger side angled a little to much towards my auto trans, it aimed striaght to right front corner of tranny pan, muffler shop had to rebend collector reducer pipe."

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About Bruce J.
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