"DTH" Doug Thorley Headers
- Doug Thorley Headers®Exhaust Header Flange Kit (THY-9508-2)Exhaust Header Flange Kit (THY-9508-2) 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...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$20.11
- Doug Thorley Headers®Exhaust Header Flange Kit (THY-9310-2)Exhaust Header Flange Kit (THY-9310-2) 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...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$31.05
- Doug Thorley Headers®Exhaust Header Flange Kit (THY-9634)Exhaust Header Flange Kit (THY-9634) 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...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$20.62
- Doug Thorley Headers®Exhaust Header Flange Kit (THY-9464-2)Exhaust 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$38.07
- Doug Thorley Headers®Exhaust Header Flange Kit (THY-9605-2)Exhaust Header Flange Kit (THY-9605-2) 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...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$38.07
- Doug Thorley Headers®Exhaust Header Flange Kit (THY-9218-2)Exhaust 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$34.55
- Doug Thorley Headers®Exhaust Header Flange Kit (THY-9341-2)Exhaust Header Flange Kit (THY-9341-2) 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...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$38.07
- Doug Thorley Headers®Exhaust Header Flange Kit (THY-9506)Exhaust Header Flange Kit (THY-9506) 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...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$26.18
- Doug Thorley Headers®Exhaust Header Flange Kit (THY-9303-2)Exhaust Header Flange Kit (THY-9303-2) 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...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$31.05
- Doug Thorley Headers®Exhaust Header Flange Kit (THY-9214-2)Exhaust Header Flange Kit (THY-9214-2) 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...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$31.05
- Doug Thorley Headers®Exhaust Header Flange Kit (THY-9248-2)Exhaust Header Flange Kit (THY-9248-2) 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...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$31.05
- Doug Thorley Headers®Exhaust Headers (THY-346-C)Exhaust Headers by Doug Thorley Headers®. Primary Tubing Diameter: 1.75". Collector Outlet Diameter: 3". This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...Compact design - great for tight spacesTough 0.375" flanges and thick wall steel tubing$811.67
- Doug Thorley Headers®Graphite Exhaust Header Flange Kit with Steel Core (THY-9300-2)Graphite Exhaust Header Flange Kit with Steel Core (THY-9300-2) 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...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$31.05
- Doug Thorley Headers®Long Tube Tri-Y Exhaust Headers (THY-123Y1-L-C)Long Tube Tri-Y Exhaust Headers by Doug Thorley Headers®. Primary Tubing Diameter: 1.75". Collector Outlet Diameter: 2.5". Header Style: Long Tube. This product is made of high-quality materials to serve you for years to come. Designed...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$1,260.38
- Doug Thorley Headers®Long Tube Tri-Y Exhaust Headers (THY-292Y-C)Long Tube Tri-Y Exhaust Headers by Doug Thorley Headers®. Primary Tubing Diameter: 1.875". Collector Outlet Diameter: 2.5". Header Style: Long Tube. This product is made of high-quality materials to serve you for years to come. Designed...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$901.70
- Doug Thorley Headers®Mild Steel Silver Ceramic Coated Short Tube Exhaust Headers (THY-224-C)Mild Steel Silver Ceramic Coated Short Tube Exhaust Headers by Doug Thorley Headers®. Primary Tubing Diameter: 1.75". Collector Outlet Diameter: 2.25". Color: Silver. Header Coating: Ceramic. Header Style: Short Tube. These shortie...Compact design - great for tight spacesTough 0.375" flanges and thick wall steel tubing$781.66
- Doug Thorley Headers®Short Tube 3-1 Exhaust Headers with Y-Pipes (THY-507-S-C)Short Tube 3-1 Exhaust Headers with Y-Pipes (THY-507-S-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.5". Collector Outlet Diameter: 2.5". Header Style: Short Tube. This complete header kit makes noticeable increases in the...Compact design - great for tight spacesTough 0.375" flanges and thick wall steel tubing$1,114.62
- Doug Thorley Headers®Short Tube 3-1 Exhaust Headers with Y-Pipes (THY-507-C)Short Tube 3-1 Exhaust Headers with Y-Pipes (THY-507-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.5". Collector Outlet Diameter: 2.5". Header Style: Short Tube. This complete header kit makes noticeable increases in the power...Compact design - great for tight spacesTough 0.375" flanges and thick wall steel tubing$1,004.59
- Doug Thorley Headers®Short Tube Exhaust Headers (THY-219-C)Short Tube Exhaust Headers (THY-219-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.5". Collector Outlet Diameter: 2.5". Header Style: Short Tube. This product is made of high-quality materials to serve you for years to come....Compact design - great for tight spacesTough 0.375" flanges and thick wall steel tubing$894.55
- Doug Thorley Headers®Short Tube Exhaust Headers (THY-221-SS-C)Short Tube Exhaust Headers (THY-221-SS-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Header Style: Short Tube. This product is made of high-quality materials to serve you for years to...Compact design - great for tight spacesTough 0.375" flanges and thick wall steel tubing$850.26
- Doug Thorley Headers®Short Tube Tri-Y Exhaust Headers (THY-560Y-C)Short Tube Tri-Y Exhaust Headers (THY-560Y-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Header Style: Short Tube. These shortie headers are a fantastic way to work some extra horsepower...Compact design - great for tight spacesTough 0.375" flanges and thick wall steel tubing$1,128.91
- Doug Thorley Headers®Steel 3/4 Length 4-1 Exhaust Headers (THY-361-C)Steel 3/4 Length 4-1 Exhaust Headers by Doug Thorley Headers®. Primary Tubing Diameter: 1.75". Collector Outlet Diameter: 2.5". Are you tired of dragging your long tube headers on the ground every time your lowered car hits a bump? If...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$671.63
- Doug Thorley Headers®Steel 3/4 Length 4-1 Exhaust Headers with Adapters (THY-380-C)Steel 3/4 Length 4-1 Exhaust Headers with Adapters (THY-380-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 3". Are you tired of dragging your long tube headers on the ground every time your...Driven by a passion for performance and superior qualityDesigned to maximize horsepower and torque of your vehicle$815.96
- Doug Thorley Headers®Steel 4-2-1 Tri-Y Exhaust Header Kit (THY-509Y-C)Steel 4-2-1 Tri-Y Exhaust Header Kit by Doug Thorley Headers®. Primary Tubing Diameter: 1.5". Collector Outlet Diameter: 2.25". This tri-y header kit is an easy installation and will really wake up the motor on your Toyota. Tri-Y, or 4...Made to provide unequaled quality and reliabilityMade with the use of the latest technologies$547.31
- Doug Thorley Headers®Steel 4-2-1 Tri-Y Exhaust Header Kit with Connector Pipe for 3.5" bolt (THY-506Y-C)Steel 4-2-1 Tri-Y Exhaust Header Kit with Connector Pipe for 3.5" bolt (THY-506Y-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.5". Collector Outlet Diameter: 2.5". This tri-y header kit is an easy installation and will really...Made to provide unequaled quality and reliabilityMade with the use of the latest technologies$570.17
- Doug Thorley Headers®Steel 4-2-1 Tri-Y Exhaust Header Kit with Connector Pipe for 4.25" bolt (THY-506Y-1-C)Steel 4-2-1 Tri-Y Exhaust Header Kit with Connector Pipe for 4.25" bolt (THY-506Y-1-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.5". Collector Outlet Diameter: 2.5". This tri-y header kit is an easy installation and will...Made to provide unequaled quality and reliabilityMade with the use of the latest technologies$593.04
- Doug Thorley Headers®Steel 4-2-1 Tri-Y Exhaust Header Kit with Y-Pipes (THY-616Y-S-C)Steel 4-2-1 Tri-Y Exhaust Header Kit with Y-Pipes (THY-616Y-S-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Backed by over 50 years of knowledge and experience, Doug's headers are...Made to provide unequaled quality and reliabilityMade with the use of the latest technologies$1,231.80
- Doug Thorley Headers®Steel 4-2-1 Tri-Y Exhaust Header Kit with Y-Pipes (THY-616Y2-S-C)Steel 4-2-1 Tri-Y Exhaust Header Kit with Y-Pipes (THY-616Y2-S-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". This product is made of high-quality materials to serve you for years to come....Made to provide unequaled quality and reliabilityMade with the use of the latest technologies$1,230.37
- Doug Thorley Headers®Steel 4-2-1 Tri-Y Exhaust Header Kit with Y-Pipes (THY-616Y2-C)Steel 4-2-1 Tri-Y Exhaust Header Kit with Y-Pipes (THY-616Y2-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". This product is made of high-quality materials to serve you for years to come....Made to provide unequaled quality and reliabilityMade with the use of the latest technologies$1,151.77
- Doug Thorley Headers®Steel 4-2-1 Tri-Y Exhaust Header Kit with Y-Pipes (THY-616Y-C)Steel 4-2-1 Tri-Y Exhaust Header Kit with Y-Pipes (THY-616Y-C) by Doug Thorley Headers®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Backed by over 50 years of knowledge and experience, Doug's headers are designed...Made to provide unequaled quality and reliabilityMade with the use of the latest technologies$1,170.35
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.