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.

Average Customer Rating

  (47)
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Ease of Installation Ease of Installation
Price/Value Price/Value
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Good but could be better

Posted on 08/10/2007 by Bob B. - 1984 Toyota Supra (Mountain View,CA)

2 of 2 people found the following review helpful.

"The only problem is you need special tools to tighten the bolts."

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About Bob B.
Vehicle
1984 Toyota Supra
I use my vehicle for
weekends
 
more power

Posted on 07/08/2007 by Robert F. - 1994 Buick Century (St. Petersburg,FL)

"I can't believe I hesitated-these header give me more power and sound great! Silverado w/4.8"

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About Robert F.
Vehicle
1994 Buick Century
I use my vehicle for
work and play
 
Great fit, a little tough to get to plugs

Posted on 05/12/2007 by Troy M. (Ann Arbor,MI)

3 of 3 people found the following review helpful.

"THese things fit great on my 1st gen camaro w/ small block. Geat clearance to PS box and tuck up really tight at the collector. Only complaint would be that it's pretty tough to get to the spark plugs (had stock manifolds on before) -- need to use box wrench on several, but I'm told this is pretty much standard practice with most headers anyway"

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About Troy M.
 
Minor imperfections

Posted on 04/24/2007 by Warren K. (Lebanon,OH)

2 of 2 people found the following review helpful.

"Some of the chrome was chipped off. There is nothing under the Doug Thorley emblem and is prone to rust. Header flange is not milled as nice as I expected. Overall could have been constructed with more quality."

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About Warren K.
 
Bolt on and go

Posted on 04/10/2007 by John G. (Fairborn,OH)

2 of 2 people found the following review helpful.

"2003 5.7L Dodge Ram 1500 4X4. Took longer to get the stock exhaust off than it did to put these on. Bolted right up without any problems. Gaskets are good quality and thick. Not like the cheap paper thin ones you get from other places. Truck is much more responsive and quicker off the line from idle. MPG hasn't changed but, what do you expect for a 5,600 lb V-8 truck? AutoAnything had them to my door a week after I ordered them, thanks."

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About John G.
 
Outstanding Quality

Posted on 04/03/2007 by Garret S. (Temperance,MI)

2 of 2 people found the following review helpful.

"When it comes to headers, Doug Thorley beats all others hands down. The quality of workmanship is flawless. When I ordered them I expected to have to go out and buy extra parts such as bolts, gaskets etc to completer the installation. NOT SO! They come with everthing you need, along with easy to read instructions for a painless installation. I highly recommend that if you are considering new exhaust components, look at Doug Thorley first."

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About Garret S.
I use my vehicle for
Recreation, Travel and camping
 
Doug Thorley 376Y 67-69 Camaro Headers

Posted on 03/22/2007 by Michael A. - 1968 Chevy Camaro (Livonia,MI)

5 of 6 people found the following review helpful.

"These headers fit great around my power steering box, have great ground clearance for a lowered car and the quality is excellent."

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About Michael A.
Vehicle
1968 Chevy Camaro
I use my vehicle for
Cruzin'
 
DOUG THORLEY HEADERS

Posted on 03/16/2007 by David M. - 1987 Toyota Pickup (Easley,SC)

1 of 2 people found the following review helpful.

"the doug thorley header was easy to install. only took about 1 hour. the construction is very good.I was pleased with this product."

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About David M.
Vehicle
1987 Toyota Pickup
I use my vehicle for
commuting hunting
 
Doug Thorley Try-Y Headers

Posted on 03/10/2007 by David C. - 1992 Chevy C/K 3500 (Moorpark,CA)

2 of 2 people found the following review helpful.

"Fit and finish was perfect. Hardware for install was changed to stainless because I ordered ceramic coating and did not want to see rust on hardware. I also used copper gaskets from header to head to prevent gasket blowout. A big change in power in pulling range as well as improved fuel mileage. Very happy with overall purchase."

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About David C.
Vehicle
1992 Chevy C/K 3500
I use my vehicle for
Towing two trailers at the same time.
 
Excellent!

Posted on 11/27/2006 by Brad S. - 2001 GMC Sierra (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.
Vehicle
2001 GMC Sierra
I use my vehicle for
Daily Driver and a little hot roddin' fun.
 
decent

Posted on 11/26/2006 by Travis H. - 1978 Ford F250 (Snohomish,WA)

1 of 2 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.
Vehicle
1978 Ford F250
I use my vehicle for
daily driver/towing
 
GREAT HEADERS

Posted on 10/31/2006 by Richard P. - 1982 Toyota Pickup (Foster City,CA)

2 of 2 people found the following review helpful.

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

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About Richard P.
Vehicle
1982 Toyota Pickup
I use my vehicle for
OFF ROADING
 
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.
I use my vehicle for
Towing car trailer,large travel trailer, everything else I can hook-up to
 
Great Headers

Posted on 10/17/2006 by Chris C. - 1987 Ford F350 (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.
Vehicle
1987 Ford F350
 
Grandma could do it, that easy.

Posted on 09/01/2006 by Douglas B. (Norfolk,VA)

2 of 2 people found the following review helpful.

"very easy install, great looks and perfomance gains"

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About Douglas B.
Vehicle
2005 Dodge Ram
Vehicle
2007 Dodge Ram
I use my vehicle for
a bunch of stuff...lol
 
Doug Thorley Headers

Posted on 07/21/2006 by Brennen C. - 1984 Toyota Celica (Port Coquitlam,BC)

1 of 2 people found the following review helpful.

"Awesome"

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About Brennen C.
Vehicle
1984 Toyota Celica
I use my vehicle for
pleasure
 
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.
I use my vehicle for
summertime
 
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.
I use my vehicle for
everything.
 
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.
I use my vehicle for
towing trailers and surf trips downt he Baja
 
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.
I use my vehicle for
hunting, exploring, fishing,hauling
 
heavy duty

Posted on 01/30/2006 by Glenn G. - 1994 Jeep Grand Cherokee (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.
Vehicle
1994 Jeep Grand Cherokee
I use my vehicle for
Idaho travel and ghost towning.
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