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Doug Thorley Headers Overview:

WE ARE STILL A 100% AMERICAN MADE PRODUCT, WHICH IS PRODUCED AT OUR FACTORY IN CORONA, CALIFORNIA. OUR GOAL, AS EVER, IS THE MAXIMIZING OF TORQUE AND HORSEPOWER GAINS AND WE WILL CONTINUE THIS TIME HONORED TRADITION AS WE MOVE INTO THE FUTURE. ALL OF US AT DOUG THORLEY HEADERS THANK ALL OF OUR CUSTOMERS FOR YOUR CONTINUED SUPPORT OVER THE YEARS AND FOR RECOGNIZING THAT OUR HEADERS AND EXHAUST SYSTEMS, DOLLAR FOR DOLLAR, ARE THE VERY BEST VALUE IN THE INDUSTRY.

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Header, Manifold, and Downpipe
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Thorley Tri-Y Headers Headers - Tri-Y - Steel - Nickel Chrome - Dodge - Ram 2500 - 3500 Pickup - 8.0L - Kit

Brand: Doug Thorley Headers

Part #: 160Y

Thorley headers are designed to outflow your stock exhaust manifolds. These headers increase gas mileage and give your engine more horsepower across the entire rpm range. The Tri-Y configuration builds the most power in the middle rpm range which... more

Starting At
$634.00

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Thorley Tri-Y Headers Headers - Tri-Y - Steel - Ceramic Coated - Dodge - Ram 2500 - 3500 Pickup - 8.0L - Kit

Brand: Doug Thorley Headers

Part #: 160YC

Thorley headers are designed to outflow your stock exhaust manifolds. These headers increase gas mileage and give your engine more horsepower across the entire rpm range. The Tri-Y configuration builds the most power in the middle rpm range which... more

Starting At
$707.00

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Thorley Tri-Y Headers Headers - Tri-Y - Steel - Nickel Chrome - Dodge - Ram 1500 - 2500 - 3500 Pickup - 5.2 - 5.9L - Kit

Brand: Doug Thorley Headers

Part #: 162Y

Thorley headers are designed to outflow your stock exhaust manifolds. These headers increase gas mileage and give your engine more horsepower across the entire rpm range. The Tri-Y configuration builds the most power in the middle rpm range which... more

Starting At
$594.00

+ Add To List

Thorley Tri-Y Headers Headers - Tri-Y - Steel - Ceramic Coated - Dodge - Ram 1500 - 2500 - 3500 Pickup - 5.2 - 5.9L - Kit

Brand: Doug Thorley Headers

Part #: 162Y-C

Thorley headers are designed to outflow your stock exhaust manifolds. These headers increase gas mileage and give your engine more horsepower across the entire rpm range. The Tri-Y configuration builds the most power in the middle rpm range which... more

Starting At
$668.00

+ Add To List

Thorley Tri-Y Headers Headers - Tri-Y - Steel - Nickel Chrome - Chevy - GMC - Van - Small Block - Pair

Brand: Doug Thorley Headers

Part #: 315Y-S

Thorley headers are designed to outflow your stock exhaust manifolds. These headers increase gas mileage and give your engine more horsepower across the entire rpm range. The Tri-Y configuration builds the most power in the middle rpm range which... more

Starting At
$562.00

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Thorley Tri-Y Headers Headers - Tri-Y - Steel - Nickel Chrome - Chevy - Class C Motor Home - Small Block - Pair

Brand: Doug Thorley Headers

Part #: 315Y

Starting At
$537.00

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Doug Thorley Headers Shortie Header

Brand: Doug Thorley Headers

Part #: THY-119-C

Doug Thorley Headers fits: 2006-2007 Dodge Charger, 2005-2007 Dodge Magnum, 2005-2007 Chrysler 300, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$552.00

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Doug Thorley Headers Shortie Header

Brand: Doug Thorley Headers

Part #: THY-515-C

Doug Thorley Headers fits: 2007-2009 Toyota FJ Cruiser, 2005-2009 Toyota Tacoma, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$363.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-321Y-C

Doug Thorley Headers fits: 2006-2009 Chevy Corvette, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$845.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-310Y

Doug Thorley Headers fits: 2000-2001 GMC Yukon, 1999-2001 GMC Sierra, 1999-2001 Chevy Tahoe, 1999-2001 Chevy Suburban, 1999-2001 Chevy Silverado, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$515.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: HDX-634-Y

Doug Thorley Headers fits: 1991-1999 Jeep Wrangler, 1991-1999 Jeep Grand Cherokee, 1991-1999 Jeep Cherokee, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$560.00

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Doug Thorley Headers Tri-Y Long Tube Header

Brand: Doug Thorley Headers

Part #: THY-333Y-C

Doug Thorley Headers fits: 2010 Chevy Camaro, 2008-2009 Pontiac G8, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$650.95

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-542Y-S

Doug Thorley Headers fits: 1981-1984 Toyota Pickup, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$369.00

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Doug Thorley Headers Shortie Header

Brand: Doug Thorley Headers

Part #: THY-508-C

Doug Thorley Headers fits: 2000-2004 Toyota Tundra, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$545.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-399Y3

Doug Thorley Headers fits: 1986-1987 GMC C/K Pickup, 1986-1987 Chevy C/K Pickup, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$640.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-396Y

Doug Thorley Headers fits: 1996-1998 GMC C/K 3500, 1996-1998 GMC C/K 2500, 1996-1998 Chevy C/K 3500, 1996-1998 Chevy C/K 2500, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$557.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-386Y2-DA

Doug Thorley Headers fits: 1988-1995 GMC C/K 3500, 1988-1995 GMC C/K 2500, 1988-1995 GMC C/K 1500, 1988-1995 Chevy C/K 3500, 1988-1995 Chevy C/K 2500, 1988-1995 Chevy C/K 1500, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header,... more

Starting At
$670.00

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Doug Thorley Headers Tri-Y Header - Catalytic Converters Located Under

Brand: Doug Thorley Headers

Part #: THY-385Y1-DA-C

Doug Thorley Headers fits: 1988-1995 GMC C/K 3500, 1988-1995 GMC C/K 2500, 1988-1995 GMC C/K 1500, 1988-1995 Chevy C/K 3500, 1988-1995 Chevy C/K 2500, 1988-1995 Chevy C/K 1500, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header,... more

Starting At
$750.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-383Y1

Doug Thorley Headers fits: 1988-1995 GMC C/K 3500, 1988-1995 GMC C/K 2500, 1988-1995 GMC C/K 1500, 1988-1995 Chevy C/K 3500, 1988-1995 Chevy C/K 2500, 1988-1995 Chevy C/K 1500, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header,... more

Starting At
$685.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-375Y

Doug Thorley Headers fits: 1968-1985 Chevy El Camino, 1968-1985 Chevy Chevelle, 1968-1977 Chevy Nova, 1967-1985 Chevy Camaro, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$533.00

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