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Doug Thorley Headers

Doug Thorley Headers are the ultimate performance upgrade for automotive enthusiasts looking to enhance their vehicle's power and efficiency. Crafted with precision and designed for optimal exhaust flow, these headers deliver a noticeable increase in horsepower and torque. Whether you're hitting the track or cruising on the street, Doug Thorley Headers provide the perfect balance of performance and durability, making them a must-have for any serious car enthusiast. Transform your ride and experience the thrill of superior performance with Doug Thorley Headers.

Newest Products for

Doug Thorley Headers Tri-Y Headers Chevrolet | GM 3100 Series Truck 4.8L-6.2L LS Swap 1955-1960
Doug Thorley Headers

Doug Thorley Headers Tri-Y Headers Chevrolet | GM 3100 Series Truck 4.8L-6.2L LS Swap 1955-1960

#THY-360Y-C
$1,095.00
Doug Thorley Headers 4:1 Mid Length Headers Chevrolet Impala LS-Motor Swap 4.8L-6.2L 1961-1964
Doug Thorley Headers

Doug Thorley Headers 4:1 Mid Length Headers Chevrolet Impala LS-Motor Swap 4.8L-6.2L 1961-1964

#THY-361-C
$825.00
Doug Thorley Headers Left & Right Cat-Back Exhaust System w/ Dual Side Exit Toyota FJ Cruiser 4.0L 2007-2014
Doug Thorley Headers

Doug Thorley Headers Left & Right Cat-Back Exhaust System w/ Dual Side Exit Toyota FJ Cruiser 4.0L 2007-2014

#89231
$1,050.00
Doug Thorley Headers Performance Y-Pipes Toyota 4Runner | Lexus GX470 4.7L 2003-2004
Doug Thorley Headers

Doug Thorley Headers Performance Y-Pipes Toyota 4Runner | Lexus GX470 4.7L 2003-2004

#89253
$575.00
Doug Thorley Headers Long Tube Tri-Y Headers Chevrolet | GM 3100 Series Truck 4.8L-6.2L LS Swap 1955-1960
Doug Thorley Headers

Doug Thorley Headers Long Tube Tri-Y Headers Chevrolet | GM 3100 Series Truck 4.8L-6.2L LS Swap 1955-1960

#THY-330Y-C
$1,095.00

Other Products for

Doug Thorley GM G-Body Tri-Y Headers with Adapters Chevrolet | Buick | Pontiac | Oldsmobile 1978-1988
Doug Thorley Headers

Doug Thorley GM G-Body Tri-Y Headers with Adapters Chevrolet | Buick | Pontiac | Oldsmobile 1978-1988

#THY-359Y-C
$1,150.00
Doug Thorley Headers 4:1 Mid Length Headers Chevrolet Impala LS-Motor Swap 4.8L-6.2L 1961-1964
Doug Thorley Headers

Doug Thorley Headers 4:1 Mid Length Headers Chevrolet Impala LS-Motor Swap 4.8L-6.2L 1961-1964

#THY-361-C
$825.00
Doug Thorley Headers Left & Right Cat-Back Exhaust System w/ Dual Side Exit Toyota FJ Cruiser 4.0L 2007-2014
Doug Thorley Headers

Doug Thorley Headers Left & Right Cat-Back Exhaust System w/ Dual Side Exit Toyota FJ Cruiser 4.0L 2007-2014

#89231
$1,050.00
Doug Thorley Headers Long Tube Tri-Y Headers Chevrolet | GM 3100 Series Truck 4.8L-6.2L LS Swap 1955-1960
Doug Thorley Headers

Doug Thorley Headers Long Tube Tri-Y Headers Chevrolet | GM 3100 Series Truck 4.8L-6.2L LS Swap 1955-1960

#THY-330Y-C
$1,095.00
Doug Thorley Headers Performance Y-Pipes Toyota 4Runner | Lexus GX470 4.7L 2003-2004
Doug Thorley Headers

Doug Thorley Headers Performance Y-Pipes Toyota 4Runner | Lexus GX470 4.7L 2003-2004

#89253
$575.00
Doug Thorley Headers Shortie Headers Chevrolet Camaro 3.6L V6 2010-2011
Doug Thorley Headers

Doug Thorley Headers Shortie Headers Chevrolet Camaro 3.6L V6 2010-2011

#THY-338-C
$620.00
Doug Thorley Headers Tri-Y Headers Chevrolet | GM 3100 Series Truck 4.8L-6.2L LS Swap 1955-1960
Doug Thorley Headers

Doug Thorley Headers Tri-Y Headers Chevrolet | GM 3100 Series Truck 4.8L-6.2L LS Swap 1955-1960

#THY-360Y-C
$1,095.00
Doug Thorley Headers with Y-Pipe Toyota Tacoma | 4Runner | Tundra no External Competition Tube 1995-2004
Doug Thorley Headers

Doug Thorley Headers with Y-Pipe Toyota Tacoma | 4Runner | Tundra no External Competition Tube 1995-2004

#THY-507-C
$1,195.00
Doug Thorley Long Tube Headers Nissan Frontier | Xterra 1998-2004
Doug Thorley Headers

Doug Thorley Long Tube Headers Nissan Frontier | Xterra 1998-2004

#THY-465-L-C
$795.00
Doug Thorley Long Tube Headers Toyota Tacoma | Tundra | FJ Cruiser | 4Runner | Hilux | Prado 2003-2012
Doug Thorley Headers

Doug Thorley Long Tube Headers Toyota Tacoma | Tundra | FJ Cruiser | 4Runner | Hilux | Prado 2003-2012

#THY-515-LS-C
$925.00
Doug Thorley Long Tube Headers with Connector Pipes GM Class A Motorhome W-Series 2001-2011
Doug Thorley Headers

Doug Thorley Long Tube Headers with Connector Pipes GM Class A Motorhome W-Series 2001-2011

#THY-312
$1,295.00
Doug Thorley Long Tube Headers with Y-Pipes Toyota Pickup | 4Runner 3.0L 4WD 1988-1995
Doug Thorley Headers

Doug Thorley Long Tube Headers with Y-Pipes Toyota Pickup | 4Runner 3.0L 4WD 1988-1995

#THY-505-C
$1,195.00
Doug Thorley Long Tube Tri-Y Headers Toyota Tundra 2007-2017
Doug Thorley Headers

Doug Thorley Long Tube Tri-Y Headers Toyota Tundra 2007-2017

#THY-560Y-L-C
$1,421.00
Doug Thorley Long Tube Tri-Y Headers with Adapters Chevrolet C10 Truck | Suburban 1961-1966
Doug Thorley Headers

Doug Thorley Long Tube Tri-Y Headers with Adapters Chevrolet C10 Truck | Suburban 1961-1966

#THY-322Y-C
$1,195.00
Doug Thorley Long Tube Tri-Y Headers with Adapters Chevrolet C10 Truck | Suburban | K5 Blazer | GMC Jimmy 1967-1972
Doug Thorley Headers

Doug Thorley Long Tube Tri-Y Headers with Adapters Chevrolet C10 Truck | Suburban | K5 Blazer | GMC Jimmy 1967-1972

#THY-324Y-C
$1,095.00
Doug Thorley Long Tube Tri-Y Headers with Adapters Chevrolet | GMC C | K 1 | 2-1Ton Trucks | Suburban | Jimmy no SMOG Fittings 1973-1991
Doug Thorley Headers

Doug Thorley Long Tube Tri-Y Headers with Adapters Chevrolet | GMC C | K 1 | 2-1Ton Trucks | Suburban | Jimmy no SMOG Fittings 1973-1991

#THY-364Y-C
$1,195.00
Doug Thorley Mid-Length Headers with Adapters Chevrolet Chevelle 1964-1967
Doug Thorley Headers

Doug Thorley Mid-Length Headers with Adapters Chevrolet Chevelle 1964-1967

#THY-346-C
$995.00
Doug Thorley Performance Mid-Pipes Nissan Frontier | Xterra | Navara | Pathfinder 2005-2016
Doug Thorley Headers

Doug Thorley Performance Mid-Pipes Nissan Frontier | Xterra | Navara | Pathfinder 2005-2016

#83206-B
$295.00
Doug Thorley Performance Mid-Pipes with Resonators Toyota FJ Cruiser | 4Runner 2WD 2007-2016
Doug Thorley Headers

Doug Thorley Performance Mid-Pipes with Resonators Toyota FJ Cruiser | 4Runner 2WD 2007-2016

#89228
$595.00
Doug Thorley Performance Mid-Pipes with Resonators Toyota Tacoma 2005-2015
Doug Thorley Headers

Doug Thorley Performance Mid-Pipes with Resonators Toyota Tacoma 2005-2015

#89227
$590.00
Doug Thorley Rear Swept Exit Short Tube Headers with Adapters Universal 4.8L-6.2L LS Motors
Doug Thorley Headers

Doug Thorley Rear Swept Exit Short Tube Headers with Adapters Universal 4.8L-6.2L LS Motors

#THY-309-1-C
$895.00
Doug Thorley Short Tube Headers Toyota 4Runner | Lexus GX470 VVT-I w/ Air Injection 2005-2009
Doug Thorley Headers

Doug Thorley Short Tube Headers Toyota 4Runner | Lexus GX470 VVT-I w/ Air Injection 2005-2009

#THY-563-SS-C
$1,284.00
Doug Thorley Short Tube Headers Toyota 4Runner | Lexus GX470 w/o Air Injection 2003-2004
Doug Thorley Headers

Doug Thorley Short Tube Headers Toyota 4Runner | Lexus GX470 w/o Air Injection 2003-2004

#THY-564-SS-C
$1,284.00
Doug Thorley Short Tube Headers Toyota Land Cruiser 100-Series | Lexus LX470 w/o Air Injection 1998-2004
Doug Thorley Headers

Doug Thorley Short Tube Headers Toyota Land Cruiser 100-Series | Lexus LX470 w/o Air Injection 1998-2004

#THY-561-SS-C
$975.00