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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.

Exhaust Subcategories

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Exhaust System Components
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Exhaust Systems
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Header, Manifold, and Downpipe
- Exhaust Collector Flange (21)
- Exhaust Collector Gasket (158)
- Exhaust Header (9,714)
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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-114Y-S

Doug Thorley Headers fits: 1972-1987 Dodge Ram, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$617.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-513Y-C

Doug Thorley Headers fits: 1971-1981 Toyota Corolla, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$370.00

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Doug Thorley Headers 3 Into 1 Header Exit

Brand: Doug Thorley Headers

Part #: THY-464-2-C

Doug Thorley Headers fits: 1990-1995 Nissan Pickup, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$470.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-397Y-DA

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
$562.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-388YL

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
$540.00

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

Brand: Doug Thorley Headers

Part #: THY-385Y2-S

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
$658.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-383Y2

Doug Thorley Headers fits: 1988-1995 GMC Suburban, 1988-1995 Chevy Suburban, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$628.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-376Y1-S-C

Doug Thorley Headers fits: 1967-1969 Chevy Camaro, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$639.00

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Doug Thorley Headers Tri-Y Header - Without Heat Riser

Brand: Doug Thorley Headers

Part #: THY-367Y-C

Doug Thorley Headers fits: 1973-1987 GMC C/K Pickup, 1973-1987 Chevy C/K Pickup, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$550.00

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Doug Thorley Headers Tri-Y Header - Comes with Replacement Heat Riser

Brand: Doug Thorley Headers

Part #: THY-367Y1-S-C

Doug Thorley Headers fits: 1973-1987 GMC C/K Pickup, 1973-1987 Chevy C/K Pickup, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$789.00

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Doug Thorley Headers Tri-Y Header - Without Heat Riser

Brand: Doug Thorley Headers

Part #: THY-364Y9-DA

Doug Thorley Headers fits: 1973-1987 GMC C/K Pickup, 1973-1987 Chevy C/K Pickup, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$666.00

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Doug Thorley Headers Tri-Y Header - With Heat Riser

Brand: Doug Thorley Headers

Part #: THY-364Y6-S-C

Doug Thorley Headers fits: 1973-1991 GMC Jimmy, 1973-1991 Chevy Blazer, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$790.00

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Doug Thorley Headers Tri-Y Header - Comes with Replacement Heat Riser -

Brand: Doug Thorley Headers

Part #: THY-364Y4-C

Doug Thorley Headers fits: 1973-1987 GMC C/K Pickup, 1973-1987 Chevy C/K Pickup, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$772.00

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Doug Thorley Headers Tri-Y Header - Comes with Replacement Heat Riser -

Brand: Doug Thorley Headers

Part #: THY-364Y1-DA

Doug Thorley Headers fits: 1973-1987 GMC C/K Pickup, 1973-1987 Chevy C/K Pickup, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$702.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-329Y-C

Doug Thorley Headers fits: 2005-2008 Chevy Corvette, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$667.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-310Y-DA

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
$543.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-302Y-FED-C

Doug Thorley Headers fits: 1996-1998 GMC C/K 3500, 1996-1998 GMC C/K 2500, 1996-1998 GMC C/K 1500, 1996-1998 Chevy C/K 3500, 1996-1998 Chevy C/K 2500, 1996-1998 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-218Y-S-C

Doug Thorley Headers fits: 1999-2004 Ford F-350, 1999-2004 Ford F-250, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$692.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-214Y-FI5

Doug Thorley Headers fits: 1993-1995 Ford F-350, 1993-1995 Ford F-250, 1993-1995 Ford F-150, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$714.00

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Doug Thorley Headers Tri-Y Header

Brand: Doug Thorley Headers

Part #: THY-199Y1

Doug Thorley Headers fits: 2003 Dodge Ram, Doug Thorley Headers. Doug Thorley Headers, Doug Thorley Header, Exhaust Headers.

Starting At
$635.00

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