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Doug Thorley Headers logo

Doug Thorley Headers Performance Products

Doug Thorley Headers are the finest quality and use top metals. These are a direct fit and are designed with exhaust flow engineering in mind. Doug Thorley Headers is an industry icon synonymous with power, performance, speed and sound. It’s a demanding position to maintain but Doug Thorley Headers is committed to their mission of upholding that standard of excellence.

Doug Thorley Headers was born in the heyday of muscle cars, street rods and other power sleds. The horsepower, torque and sound of American street racing royalty are fused with every Doug Thorley Headers design as a result. There’s simply no better set for your ride than a set of pipes from Doug Thorley Headers.
Doug Thorley Headers authorized dealer
Truck Accessory Site is your online source for performance products. We offer a large selection of exhaust systems everyday with fast free shipping. Shop below for Doug Thorley Headers, cat back, dual exit, and single exit exhaust systems. We offer exhaust systems and headers for almost any truck or SUV. We are authorized dealers of Doug Thorley Headers, start shopping below.

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Doug Thorley Headers Doug Thorley Headers Diesel Cat Back Exhaust System
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. Your diesel rig came with more than enough horsepower and torque for the average driver. Doug Thorley Exhausts have never been much for average, though. Their decades-long mission has been to make stock exhausts look inferior. This is where Doug Thorley Headers’ Diesel Exhaust comes in for your truck. Using 16-gauge aluminized steel tubing in a girthy 4” diameter, custom CNC mandrel bending and a free-flowing muffler, a Thorley Diesel Exhaust adds instant punch at the pedal. It provides loads of low-end pulling torque, too. Doug Thorley Diesel Exhausts keep installation simple. All diesel exhausts mount to the original positions, and include factory-style hangers for straightforward mounting. Plus, each Doug Thorley Diesel Exhaust stays 50-state smog legal. To top it all off, your Doug Thorley Diesel Exhaust is capped by a burly 5” diameter chrome exhaust tip and carries a Lifetime Warranty for the original owner—hardly an average deal on diesel exhaust.

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Doug Thorley Headers Dual Exit Exhaust System Doug Thorley Headers Single Exit Exhaust System
The near 50-year tradition of exhaust excellence at Doug Thorley Headers now bears new performance fruit: dual cat-back exhaust. Doug Thorley Dual Exit Cat-Back Exhausts offer the same legendary quality and power, plus the masterful look of dual exits. Doug Thorley Cat-Back Exhausts hold the easiest recipe for performance: quality materials, top-end engineering and a premium fit. All pipes are 16-gauge aluminized steel tubing that’s CNC mandrel-bent to eliminate backpressure. Also at work is a premium Thorley Aeroflow muffler for power and a mighty exhaust rumble. Doug Thorley Cat-Back Exhausts are also engineered for a precise fit. Integrated factory-style hangers make for simple installation. In fact, most Doug Thorley Cat-Back Exhausts require no cutting or welding. Each exit pipe is topped by a premium chrome exhaust tip. And, to top it all off, your Doug Thorley Dual-Exit Cat-Back Exhaust boasts a Lifetime Warranty. Doug Thorley Headers have been making performance exhaust power simple since 1958. Now, with their fresh line of Doug Thorley Cat-Back Exhausts, extra tire-spinning ponies have never been easier to add to any vehicle. Doug Thorley Cat-Back Exhausts know the quickest route to extra power: quality materials, top-end engineering and a premium fit. All pipes are 16-gauge aluminized steel tubing that’s CNC mandrel-bent to eliminate backpressure. Free-flowing exhaust jets through a premium Thorley Aeroflow muffler for power and a manly exhaust rumble. Doug Thorley Cat-Back Exhausts fit perfectly and look great, too. Integrated factory-style hangers make for simple installation. In fact, most systems require no cutting or welding. And, each exit pipe is topped by a premium chrome exhaust tip. Your Doug Thorley Cat-Back Exhaust boasts a Lifetime Warranty to the original owner, too. Easy power makes your performance exhaust choice easy: install a Thorley!
Doug Thorley Application Chart
Vehicle Make and Model Year Part #
Buick Roadmaster Doug Thorley Dual Exit Exhaust System 1991-1993 85462
Cadillac Escalade Doug Thorley Single Exit Exhaust System 2002-2006 85222
Cadillac Fleetwood Doug Thorley Dual Exit Exhaust System 1992-1994 85460
Chevy Astro Doug Thorley Dual Exit Exhaust System 1996-2003 85236
Chevy Astro Doug Thorley Single Exit Exhaust System 1999 85223
Chevy Avalanche Doug Thorley Headers 2001-2006 THY-314
Chevy Avalanche Doug Thorley Single Exit Exhaust System 2002-2006 85213
Chevy Blazer Doug Thorley Headers 1973-1991 THY-364Y6
Chevy Blazer Doug Thorley Single Exit Exhaust System 1995-1999 85259
Chevy Camaro Doug Thorley Dual Exit Exhaust System 1983-2002 85403
Chevy Camaro Doug Thorley Headers 1967-1985 THY-313
Chevy Caprice Doug Thorley Dual Exit Exhaust System 1991-1996 85462
Chevy Chevelle Doug Thorley Headers 1966-1985 THY-313
Chevy Colorado Doug Thorley Single Exit Exhaust System 2004-2006 85238
Chevy Corvette Doug Thorley Headers 1963-1977 THY-350-C
Chevy El Camino Doug Thorley Headers 1966-1987 THY-313
Chevy Impala Doug Thorley Dual Exit Exhaust System 1992-1996 85460
Chevy Kodiak Doug Thorley Diesel Cat Back Exhaust System 2004-2006 85315
Chevy Monte Carlo Doug Thorley Dual Exit Exhaust System 2000-2002 85410
Chevy Nova Doug Thorley Headers 1968-1977 THY-313
Chevy Silverado Doug Thorley Diesel Cat Back Exhaust System 2001-2005 85276
Chevy Silverado Doug Thorley Dual Exit Exhaust System 1999-2006 85285
Chevy Silverado Doug Thorley Headers 1999-2006 THY-310Y
Chevy Silverado Doug Thorley Single Exit Exhaust System 1999-2006 85284
Chevy Suburban Doug Thorley Headers 1999-2006 THY-310Y
Chevy Suburban Doug Thorley Single Exit Exhaust System 2000-2006 85209
Chevy Suburban Pre-2000 Doug Thorley Dual Exit Exhaust System 1992-1999 85204
Chevy Suburban Pre-2000 Doug Thorley Headers 1973-1995 THY-367Y3
Chevy Suburban Pre-2000 Doug Thorley Single Exit Exhaust System 1987-1999 85203
Chevy Tahoe Doug Thorley Dual Exit Exhaust System 1998-2000 85266
Chevy Tahoe Doug Thorley Headers 1999-2006 THY-310Y
Chevy Tahoe Doug Thorley Single Exit Exhaust System 1996-2006 85250
Chevy Trailblazer Doug Thorley Single Exit Exhaust System 2002-2004 85256
Chevy Truck 1500 Doug Thorley Dual Exit Exhaust System 1994-1998 85255
Chevy Truck 1500 Doug Thorley Headers 1986-1998 THY-399Y2
Chevy Truck 1500 Doug Thorley Single Exit Exhaust System 1988-2000 85211
Chevy Truck 2500 Doug Thorley Dual Exit Exhaust System 1994-1998 85255
Chevy Truck 2500 Doug Thorley Headers 1986-1998 THY-399Y2
Chevy Truck 2500 Doug Thorley Single Exit Exhaust System 1988-2000 85211
Chevy Truck 3500 Doug Thorley Dual Exit Exhaust System 1994-1998 85255
Chevy Truck 3500 Doug Thorley Headers 1986-1998 THY-399Y2
Chevy Truck 3500 Doug Thorley Single Exit Exhaust System 1988-2000 85211
Chevy Truck C/K Doug Thorley Headers 1967-1991 THY-372Y
Chevy Truck S10 Doug Thorley Headers 1996-2002 THY-362
Chevy Truck S10 Doug Thorley Single Exit Exhaust System 1994-2003 85215
Chevy Van Doug Thorley Headers 1970-1987 THY-315Y-C
Chevy Z-28 Doug Thorley Headers 1967-1969 THY-376Y1
Chrysler PT Cruiser Doug Thorley Single Exit Exhaust System 2001-2005 87401
Dodge Charger Doug Thorley Dual Exit Exhaust System 2005-2006 87403
Dodge Dakota Doug Thorley Headers 1992-2003 THY-190Y
Dodge Dakota Doug Thorley Single Exit Exhaust System 1996-2006 87212
Dodge Durango Doug Thorley Single Exit Exhaust System 1998-2005 87204
Dodge Magnum Doug Thorley Dual Exit Exhaust System 2005-2006 87403
Dodge Ram Doug Thorley Diesel Cat Back Exhaust System 1994-2006 87227
Dodge Ram Doug Thorley Dual Exit Exhaust System 1998-2001 87203
Dodge Ram Doug Thorley Headers 1972-2004 THY-114Y-C
Dodge Ram Doug Thorley Single Exit Exhaust System 1979-2005 87208
Dodge Van Doug Thorley Headers 1970-1987 THY-106Y-C
Ford Bronco Doug Thorley Headers 1980-1996 THY-248Y
Ford Bronco Doug Thorley Single Exit Exhaust System 1987-1995 86207
Ford Escape Doug Thorley Single Exit Exhaust System 2001-2003 86212
Ford Excursion Doug Thorley Diesel Cat Back Exhaust System 2000-2005 86217
Ford Excursion Doug Thorley Single Exit Exhaust System 2000-2003 86202
Ford Expedition Doug Thorley Single Exit Exhaust System 2002 86205
Ford Explorer Doug Thorley Single Exit Exhaust System 1993-2004 86221
Ford F150 Doug Thorley Dual Exit Exhaust System 1998-2003 86232
Ford F150 Doug Thorley Headers 1975-1997 THY-211Y-C
Ford F150 Doug Thorley Single Exit Exhaust System 1987-2006 86225
Ford F250 Doug Thorley Diesel Cat Back Exhaust System 1994-2006 86215
Ford F250 Doug Thorley Dual Exit Exhaust System 1998-2003 86232
Ford F250 Doug Thorley Headers 1973-2003 THY-210
Ford F250 Doug Thorley Single Exit Exhaust System 1987-2006 86225
Ford F350 Doug Thorley Diesel Cat Back Exhaust System 1994-2006 86215
Ford F350 Doug Thorley Headers 1975-2003 THY-211Y-C
Ford F350 Doug Thorley Single Exit Exhaust System 1994-2003 86216
Ford F450 Doug Thorley Diesel Cat Back Exhaust System 1999 86238
Ford F550 Doug Thorley Diesel Cat Back Exhaust System 1999 86238
Ford Focus Doug Thorley Single Exit Exhaust System 2000-2001 86406
Ford Mustang Doug Thorley Dual Exit Exhaust System 1986-2006 86401
Ford Mustang Doug Thorley Headers 2005 THY-290
Ford Mustang Doug Thorley Single Exit Exhaust System 1994-2003 86403
Ford Ranger Doug Thorley Headers 2003-2006 THY-220
Ford Ranger Doug Thorley Single Exit Exhaust System 1987-2003 86213
Ford Van Doug Thorley Single Exit Exhaust System 2000 86235
GMC Canyon Doug Thorley Single Exit Exhaust System 2004-2006 85238
GMC Envoy Doug Thorley Single Exit Exhaust System 2002-2004 85256
GMC Jimmy Doug Thorley Headers 1973-1991 THY-364Y6
GMC Jimmy Doug Thorley Single Exit Exhaust System 1995-1999 85259
GMC Safari Doug Thorley Dual Exit Exhaust System 1996-2003 85236
GMC Safari Doug Thorley Single Exit Exhaust System 1999 85223
GMC Sierra Doug Thorley Diesel Cat Back Exhaust System 2001-2005 85276
GMC Sierra Doug Thorley Dual Exit Exhaust System 1999-2006 85285
GMC Sierra Doug Thorley Headers 1999-2006 THY-310Y
GMC Sierra Doug Thorley Single Exit Exhaust System 1999-2006 85284
GMC Sonoma Doug Thorley Single Exit Exhaust System 1994-2003 85215
GMC Suburban Pre-2000 Doug Thorley Dual Exit Exhaust System 1992-1999 85204
GMC Suburban Pre-2000 Doug Thorley Headers 1973-1995 THY-367Y4
GMC Suburban Pre-2000 Doug Thorley Single Exit Exhaust System 1987-1999 85203
GMC Truck 1500 Doug Thorley Dual Exit Exhaust System 1994-1998 85255
GMC Truck 1500 Doug Thorley Headers 1986-1998 THY-399Y2
GMC Truck 1500 Doug Thorley Single Exit Exhaust System 1988-2000 85211
GMC Truck 2500 Doug Thorley Dual Exit Exhaust System 1994-1998 85255
GMC Truck 2500 Doug Thorley Headers 1986-1998 THY-399Y2
GMC Truck 2500 Doug Thorley Single Exit Exhaust System 1988-2000 85211
GMC Truck 3500 Doug Thorley Dual Exit Exhaust System 1994-1998 85255
GMC Truck 3500 Doug Thorley Headers 1986-1998 THY-399Y2
GMC Truck 3500 Doug Thorley Single Exit Exhaust System 1988-2000 85211
GMC Truck C/K Doug Thorley Headers 1967-1991 THY-372Y
GMC Van Doug Thorley Headers 1970-1987 THY-315Y-C
GMC Yukon Doug Thorley Dual Exit Exhaust System 1998-2000 85266
GMC Yukon Doug Thorley Headers 1999-2006 THY-310Y
GMC Yukon Doug Thorley Single Exit Exhaust System 1996-2006 85250
GMC Yukon XL Doug Thorley Single Exit Exhaust System 2000-2006 85209
Hummer H2 Doug Thorley Headers 2002-2006 THY-309
Hummer H2 Doug Thorley Single Exit Exhaust System 2003-2006 85298
Jeep Cherokee Doug Thorley Headers 1972-2004 THY-616Y
Jeep Cherokee Doug Thorley Single Exit Exhaust System 1987-2000 88201
Jeep CJ Doug Thorley Headers 1972-1984 THY-605Y
Jeep Grand Cherokee Doug Thorley Headers 1991-1999 HDX-634-Y
Jeep Grand Cherokee Doug Thorley Single Exit Exhaust System 1993-2004 88200
Jeep Liberty Doug Thorley Single Exit Exhaust System 2002-2004 88210
Jeep Wrangler Doug Thorley Headers 1991-2004 HDX-634-Y
Jeep Wrangler Doug Thorley Single Exit Exhaust System 1987-2006 88206
Lincoln Navigator Doug Thorley Single Exit Exhaust System 2002 86205
Mercury Capri Doug Thorley Dual Exit Exhaust System 1986-1993 86401
Mercury Mountaineer Doug Thorley Single Exit Exhaust System 1996-2003 86223
Mini Cooper Mini Cooper Doug Thorley Dual Exit Exhaust System 2003-2005 83402
Mini Cooper Mini Cooper Doug Thorley Single Exit Exhaust System 2003-2005 83404
Nissan Armada Doug Thorley Single Exit Exhaust System 2004-2006 83204
Nissan Frontier Doug Thorley Single Exit Exhaust System 2000-2006 83201
Nissan Pathfinder Doug Thorley Headers 1986-1989 THY-464-1
Nissan Pickup Doug Thorley Headers 1986-1995 THY-464-1
Nissan Titan Doug Thorley Single Exit Exhaust System 2004-2006 83202
Oldsmobile Bravada Doug Thorley Single Exit Exhaust System 1995-1999 85259
Pontiac Firebird Doug Thorley Dual Exit Exhaust System 1983-2002 85403
Scion xB Doug Thorley Single Exit Exhaust System 2003-2005 89404
Toyota Celica Doug Thorley Headers 1976-1981 THY-502Y-O
Toyota Celica Doug Thorley Single Exit Exhaust System 2000-2001 89401
Toyota Corolla Doug Thorley Headers 1971-1981 THY-513Y-O
Toyota Matrix Doug Thorley Single Exit Exhaust System 2002-2004 89402
Toyota Pickup Doug Thorley Headers 1981-1995 THY-542Y
Toyota Pickup Doug Thorley Single Exit Exhaust System 1988-1994 89200
Toyota Sequoia Doug Thorley Single Exit Exhaust System 2001-2003 89216
Toyota Supra Doug Thorley Headers 1982-1985 THY-530Y
Toyota T100 Doug Thorley Single Exit Exhaust System 1995-1998 89207
Toyota Tacoma Doug Thorley Headers 2005-2007 THY-509Y-C
Toyota Tacoma Doug Thorley Single Exit Exhaust System 1995-2006 89202
Toyota Tundra Doug Thorley Single Exit Exhaust System 2000-2005 89208
 


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