"DTH" Doug Thorley Headers
- Doug Thorley Headers®Tail-Pipes with Exhaust TipsTail-Pipes with Exhaust Tips by Doug Thorley Headers®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$347.90
- Doug Thorley Headers®Exhaust SystemsExhaust Systems by Doug Thorley Headers®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$299.62 - $874.72
- Doug Thorley Headers®Header Flange Gasket KitHeader Flange Gasket Kit by Doug Thorley Headers®. Replace your worn gaskets with Doug's high quality graphite and steel gaskets. Much better sealing capabilities and longevity over lower quality alternatives.Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$35.00
- Doug Thorley Headers®3-1 Long-Tube Headers3-1 Long-Tube Headers by Doug Thorley Headers®. Doug's headers are designed to outflow your stock exhaust manifolds by leaps and bounds. Their headers will increase the power of your motor across the widest RPM band possible. That is...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$620.19 - $848.83
- Doug Thorley Headers®4-1 Long-Tube Headers4-1 Long-Tube Headers by Doug Thorley Headers®. Doug's headers are designed to outflow your stock exhaust manifolds by leaps and bounds. Their headers will increase the power of your motor across the widest RPM band possible. That is...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$875.98 - $915.99
- Doug Thorley Headers®4-2-1 Long-Tube Headers4-2-1 Long-Tube Headers by Doug Thorley Headers®. Doug's headers are designed to outflow your stock exhaust manifolds by leaps and bounds. Their headers will increase the power of your motor across the widest RPM band possible. That is...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$535.88 - $1,277.53
- Doug Thorley Headers®4-2-1 Tri-Y Headers4-2-1 Tri-Y Headers by Doug Thorley Headers®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$495.86 - $1,236.09
- Doug Thorley Headers®Exhaust Header Flange KitExhaust Header Flange Kit by Doug Thorley Headers®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$19.03 - $38.07
- Doug Thorley Headers®Long-Tube HeadersLong-Tube Headers by Doug Thorley Headers®. Doug's headers are designed to outflow your stock exhaust manifolds by leaps and bounds. Their headers will increase the power of your motor across the widest RPM band possible. That is the...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$901.70 - $1,260.38
- Doug Thorley Headers®Mid-Length Tube HeadersMid-Length Tube Headers by Doug Thorley Headers®. Primary Tubing Diameter: 1.75". Collector Outlet Diameter: 3". Color: Silver. Header Coating: Ceramic. Header Style: Mid-Length Tube. This product is made of high-quality...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$671.63 - $863.12
- Doug Thorley Headers®Shortie HeaderShortie Header by Doug Thorley Headers®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$397.26 - $417.27
- Doug Thorley Headers®Shortie HeadersShortie Headers by Doug Thorley Headers®. Header Style: Short Tube.Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$515.87 - $1,176.07
- Doug Thorley Headers®Tri-Y Exhaust HeadersTri-Y Exhaust Headers by Doug Thorley Headers®. Doug's headers are designed to outflow your stock exhaust manifolds by leaps and bounds. Their headers will increase the power of your motor across the widest RPM band possible. That is...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$913.13 - $1,350.41
- Doug Thorley Headers®Tri-Y HeaderTri-Y Header by Doug Thorley Headers®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$888.84 - $997.44
- Doug Thorley Headers®Catalytic Flange GasketCatalytic Flange Gasket by Doug Thorley Headers®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver...Built to match your exact requirementsHigh quality you can rely on$4.76 - $19.00
- Doug Thorley Headers®Stainless Steel Natural Muffler Delete Tailpipes (85424)Stainless Steel Natural Muffler Delete Tailpipes (85424) by Doug Thorley Headers®. Main Piping Diameter: 2.5". With Polished Exhaust Tips. If you're looking for that American muscle car sound from your Camaro without the price tag of a...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$347.90
- Doug Thorley Headers®304 SS Axle-Back Exhaust System with Single Rear Exit (85425)304 SS Axle-Back Exhaust System with Single Rear Exit by Doug Thorley Headers®. Exhaust System Type: Axle-Back. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 2.25". Exhaust System Sound: Aggressive / Loud. This quality...$299.62
- Doug Thorley Headers®Stainless Steel Axle-Back Exhaust System with Single Rear Exit (83207)Stainless Steel Axle-Back Exhaust System with Single Rear Exit by Doug Thorley Headers®. Exhaust System Type: Axle-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 2.5". Exhaust System Sound: Aggressive / Loud. This...$328.02
- Doug Thorley Headers®Stainless Steel Cat-Back Exhaust System with Single Rear Exit (83206)Stainless Steel Cat-Back Exhaust System with Single Rear Exit by Doug Thorley Headers®. With Y-Pipe. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 2.5" to 2.25". Exhaust System Sound:...$558.06
- Doug Thorley Headers®Stainless Steel Cat-Back Exhaust System with Single Side Exit (89231)Stainless Steel Cat-Back Exhaust System with Single Side Exit by Doug Thorley Headers®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 2.5" to 2.25". Exhaust System Sound: Aggressive /...$874.72
- Doug Thorley Headers®Stainless Steel Cat-Back Exhaust System with Single Side Exit (89248)Stainless Steel Cat-Back Exhaust System with Single Side Exit by Doug Thorley Headers®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 2.5" to 2.25". Exhaust System Sound: Aggressive /...$643.26
- Doug Thorley Headers®Stainless Steel Cat-Back Exhaust System with Single Side Exit (83205)Stainless Steel Cat-Back Exhaust System with Single Side Exit by Doug Thorley Headers®. With Y-Pipe. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 2.5" to 2.25". Exhaust System Sound:...$545.28
- Doug Thorley Headers®3-1 Steel Short Tube Exhaust Headers (THY-338-C)3-1 Steel Short Tube Exhaust Headers (THY-338-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.5". Collector Outlet Diameter: 2.5". Header Style: Short Tube. If you're looking to squeeze a little more power out of your V6 Camaro...Compact design - great for tight spacesTough 0.375" flanges and thick wall steel tubing$515.87
- Doug Thorley Headers®3-1 Steel Short Tube Exhaust Headers (THY-470-C)3-1 Steel Short Tube Exhaust Headers by Doug Thorley Headers®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.25". Header Style: Short Tube. These shortie headers are a fantastic way to work some extra horsepower out of...Compact design - great for tight spacesTough 0.375" flanges and thick wall steel tubing$603.04
- Doug Thorley Headers®304 SS 4-2-1 Tri-Y Exhaust Header (HDX-634Y)304 SS 4-2-1 Tri-Y Exhaust Header (HDX-634Y) by Doug Thorley Headers®. Primary Tubing Diameter: 1.5". Collector Outlet Diameter: 2.5". This complete tri-y header kit will really wake up the motor on your 4.0L Jeep. Tri-Y (or 4 into 2...Made to provide unequaled quality and reliabilityMade with the use of the latest technologies$755.94
- Doug Thorley Headers®304 SS 4-2-1 Tri-Y Exhaust Header Kit (THY-716Y-SS)304 SS 4-2-1 Tri-Y Exhaust Header Kit (THY-716Y-SS) by Doug Thorley Headers®. Primary Tubing Diameter: 1.5". Collector Outlet Diameter: 2.5". This complete tri-y header kit will really wake up the motor on your Samurai or Tracker....Made to provide unequaled quality and reliabilityMade with the use of the latest technologies$495.86
- Doug Thorley Headers®304 SS 4-2-1 Tri-Y Exhaust Header Kit (THY-700Y-SS)304 SS 4-2-1 Tri-Y Exhaust Header Kit (THY-700Y-SS) by Doug Thorley Headers®. Primary Tubing Diameter: 1.5". Collector Outlet Diameter: 2.25". This complete tri-y header kit will really wake up the motor on your Samurai. Tri-Y, or 4...Made to provide unequaled quality and reliabilityMade with the use of the latest technologies$500.15
- Doug Thorley Headers®304 SS 4-2-1 Tri-Y Exhaust Headers (THY-481Y-LSO-C)304 SS 4-2-1 Tri-Y Exhaust Headers by Doug Thorley Headers®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.25". This complete header kit makes huge increases in power output of your 5.6L Nissan. Tri-Y (or 4 into 2 into...Made to provide unequaled quality and reliabilityMade with the use of the latest technologies$913.13
- Doug Thorley Headers®304 SS Long Tube 3-1 Exhaust Headers (THY-515-LS-C)304 SS Long Tube 3-1 Exhaust Headers (THY-515-LS-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.25". Header Style: Long Tube. This long tube header kit really wakes up the 4.0L Toyota motor....High quality at an affordable priceExpertly made from premium materials$675.92
- Doug Thorley Headers®304 SS Long Tube 3-1 Exhaust Headers (THY-517-LS-C)304 SS Long Tube 3-1 Exhaust Headers by Doug Thorley Headers®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.25". Header Style: Long Tube. This long tube header kit really wakes up the 4.0L Toyota motor. Made out of T304...High quality at an affordable priceExpertly made from premium materials$833.11
Since Doug Thorley Headers invented the Tri-Y header far back in 1958, it had been known as a pioneer in the automotive aftermarket. Now, with over 50 years of experience, the company continues to be driven by passion for premium quality and superior performance and manufacture 100% American-made headers and exhaust systems for a great number of applications. Built to reliably provide the greatest horsepower and torque, all Doug Thorley exhaust components are made from the finest materials with meticulous attention to detail.
As every vehicle is unique, the Doug Thorley Headers product line includes hundreds of top-notch products and applications to satisfy various customers’ requirements. Globally known for its Tri-Y header, the company currently offers a significantly upgraded version of this product built using up-to-the-date technologies to deliver both maximum low/mid range torque and ample horsepower, which is perfect for tow-rings, trucks, RVs and most street applications. For muscle car owners, Doug Thorley Headers provides WORX Series Headers.
All Doug Thorley LS swap headers are professionally tuned to ensure maximum possible power and efficiency. The company also manufactures Long Tube and Shortie headers. The first ones are designed to replace the original exhaust manifolds that come with long primary tubes in order to significantly increase exhaust flow, while reducing power robbing back pressure within the system. Doug Thorley Shortie Headers feature thick wall steel tubing, which ensures increased flow of exhaust gasses. These products have the factory mounting locations for emissions equipment, and that guarantees that the vehicle keeps being street legal. The product line of the company also includes cat-back and turbo-back exhaust systems built to deliver not only a satisfying rumble, but also more horsepower and torque compared to the OEM ones.