Doug Thorley Headers

Doug Thorley Headers

THY-330Y-C / 1947-1954 Chevy Series Pickup LS Series Motor Swap 4.8L-6.2L (1-3/4"Primary Tubes)

Doug Thorley Headers

THY-328-C / Sandrail Rear Exit LS Motors 4.8L-6.2L

Doug Thorley Headers

THY-325-C / Sandrail LS Motors 4.8L-6.2L with Bombshell Muffler

Doug Thorley Headers

THY-306Y1-C / 1987-1994 GM Class A Motorhome with Turbo 400 Trans 366-454

Doug Thorley Headers

THY-214Y-FI2-C / 1988-1992 Ford class A motorhome F250/F350 pickup truck 460 F.I.2/4 wd (NO SMOG FITTINGS)

Doug Thorley Headers

HDX-635 / 2000-2006 Jeep Wrangler / Cherokee / Grand Cherokee 4.0L H/O, 6:2 Short Tube Header (Off Road/Race Use Only)

Doug Thorley Headers

HDX-634Y / Stainless Steel Tri-Y Header 1991-99 Jeep Wrangler / Cherokee / Grand Cherokee, 4.0L H/O

Doug Thorley Headers

THY-509Y-C / 2005-2019 Toyota 2.7L Tacoma / 4Runner / Prado / Hilux Tri-Y Header

Doug Thorley Headers

THY-507-C / 1995-2004 Toyota Tacoma / 1995-2002 4Runner / 2000-04 Tundra 3.4L Headers w/ Y-pipe

Doug Thorley Headers

THY-505-C / 1988-1995 Toyota Truck 4 Runner Long Tube Headers 3.0L (4WD)

Doug Thorley Headers

THY-214Y-FI6-S-C / 1996-1997 Ford F250/350 pickup truck 460 F .I. 2/4 wd (W/SMOG FITTINGS)

Doug Thorley Headers

THY-214Y-FI6-C / 1996-1997 Ford F250/350 pickup truck 460 F .I. 2/4 wd (NO SMOG FITTINGS)

Doug Thorley Headers

THY-214Y-FI5-S-C / 1993-1995 Ford F250/350 pickup truck 460 F.I.(with air injections) (W/SMOG FITTINGS)

Doug Thorley Headers

THY-214Y-FI5-C / 1993-1995 Ford F250/350 pickup truck 460 F.I.(with air injections) (NO SMOG FITTINGS)

Doug Thorley Headers

THY-214Y-FI4-S-C / 1993-1995 Ford class A motorhome 460 F.I.(with air injection) (W/SMOG FITTINGS)

Doug Thorley Headers

THY-214Y-FI4-C / 1993-5-95 Ford class A motorhome 460 F.I.(with air injection) (NO SMOG FITTINGS)