Performance Exhaust System

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Doug Thorley Diesel Cat Back Exhaust System - Guide

Doug Thorley Diesel Cat Back Exhaust System

Doug Thorley Headers Bolt on the legend of Doug Thorley to your diesel rig's exhaust and hang on tight. The Doug Thorley Diesel Cat Back Exhaust System uses a fat 4" diameter, 16-gauge aluminized steel tubing that's custom CNC mandrel bent. Pair this with a free-flowing performance muffler and add instant punch at the pedal. The Doug Thorley Diesel Cat Back Exhaust System mounts to factory locations and is 50-state smog legal. And, like every Thorley Product, your Doug Thorley Diesel Cat Back Exhaust System is backed by a Lifetime Warranty.
The Doug Thorley Diesel Cat Back Exhaust System
  The Doug Thorley Diesel Cat Back Exhaust System  
  • Doug Thorley Diesel Cat Back Exhaust System is crafted for Powerstroke, Duramax and Cummins diesel trucks
  • Custom CNC mandrel-bent 16-gauge aluminized steel tubing is used in every Doug Thorley Diesel Cat Back Exhaust System
  • Massive 4" pipe diameter for high-displacement diesel engines
  • Your Doug Thorley Diesel Cat Back Exhaust System bolts directly to stock mounting positions at the turbo or catalytic converter
  • Doug Thorley's Diesel Cat Back Exhaust System Uses factory-style hangers for straightforward mounting
  • The Doug Thorley Diesel Cat Back Exhaust System includes a high-performance muffler and a 5" chrome exhaust tip
  • The Doug Thorley Diesel Cat Back Exhaust System features a Lifetime Warranty
  • Complete list of all Doug Thorley Performance Parts available at: Doug Thorley Performance Parts

Doug Thorley Diesel Cat Back Exhaust System - Application List:

Make & Model Years Submodel Part #
Chevy Kodiak 2004-2006 2/4wd C4500 Crew Cab Long Bed 6.6L Diesel 85315
Chevy Kodiak 2004-2006 C4500 Crew Cab Long Bed Single Stock Catalytic Converter 85315
Chevy Silverado 2001-2005 6.6L 2500/3500 HD Crew Cab Long Bed Single Catalytic Converter 85276
Chevy Silverado 2001-2005 6.6L 2500/3500 HD Crew Cab Short Bed Single Catalytic Converter 85278
Chevy Silverado 2001-2005 6.6L 2500/3500 HD Extended Cab Long Bed Single Catalytic Converter 85304
Chevy Silverado 2001-2005 6.6L 2500/3500 HD Extended Cab Short Bed Single Catalytic Converter 85313
Chevy Silverado 2001-2005 6.6L 2500/3500 HD Standard Cab Long Bed Single Catalytic Converter 85301
Chevy Silverado 2001-2004 2500/3500 Heavy Duty Crew Cab Long Bed 6.6L Diesel without a Single Stock Catalytic Converter 85302
Chevy Silverado 2001-2004 2500/3500 Heavy Duty Crew Cab Short Bed 6.6L Diesel without a Single Stock Catalytic Converter 85286
Chevy Silverado 2001-2004 2500/3500 Heavy Duty Extended Cab Long Bed 6.6L Diesel without a Single Stock Catalytic Converter 85306
Chevy Silverado 2001-2004 2500/3500 Heavy Duty Extended Cab Short Bed 6.6L Diesel without a Single Stock Catalytic Converter 85305
Chevy Truck 1500 1988-1993 Extended Cab Short Bed and Long Bed 6.2L Diesel 85211
Chevy Truck 1500 1988-1993 Standard Cab Short Bed and Long Bed 6.2L Diesel 85245
Chevy Truck 2500 1988-1993 Extended Cab Short Bed and Long Bed 6.2L Diesel 85211
Chevy Truck 2500 1988-1993 Standard Cab Short Bed and Long Bed 6.2L Diesel 85245
Chevy Truck 3500 1988-1993 Extended Cab Short Bed and Long Bed 6.2L Diesel 85211
Chevy Truck 3500 1988-1993 Standard Cab Short Bed and Long Bed 6.2L Diesel 85245
Dodge Ram 2005 5.9L Turbo Diesel 87237
Dodge Ram 2004 Fits all Models Manufactured After June 5.9L Turbo Diesel 87237
Dodge Ram 2004 Fits all Models Manufactured Before May 5.9L Turbo Diesel 87231
Dodge Ram 2003 5.9L Turbo Diesel 87231
Dodge Ram 1996-2002 5.9L Turbo Diesel Single Stock Catalytic Converter 87219
Dodge Ram 1994-1995 5.9L Turbo Diesel 87227
Ford Excursion 2003-2005 6.0L Turbo Diesel Single Stock Catalytic Converter 86243
Ford Excursion 2000-2002 7.3L Turbo Diesel 86217
Ford F250 2003-2006 6.0L Turbo Diesel Single Stock Catalytic Converter 86242
Ford F250 2004 6.0L Turbo Diesel without a Single Stock Catalytic Converter 86244
Ford F250 1999-2003 Automatic 7.3L Turbo Diesel Single Stock Catalytic Converter 86227
Ford F250 1999-2003 Automatic 7.3L Turbo Diesel without a Single Stock Catalytic Converter 86229
Ford F250 1994-1997 Manual Extended Cab Short Bed and Crew Cab Short Bed 7.3L Turbo Diesel Single Stock Catalytic Converter 86215
Ford F350 2003-2006 6.0L Turbo Diesel Single Stock Catalytic Converter 86242
Ford F350 2004 6.0L Turbo Diesel without a Single Stock Catalytic Converter 86244
Ford F350 1999-2003 Automatic 7.3L Turbo Diesel Single Stock Catalytic Converter 86227
Ford F350 1999-2003 Automatic 7.3L Turbo Diesel without a Single Stock Catalytic Converter 86229
Ford F350 1994-1997 Manual Extended Cab Short Bed and Crew Cab Short Bed 7.3L Turbo Diesel Single Stock Catalytic Converter 86215
Ford F450 1999 Super Duty F-450 7.3L Turbo Diesel 86238
Ford F550 1999 Super Duty F-450 7.3L Turbo Diesel 86238
GMC Sierra 2001-2005 6.6L 2500/3500 HD Crew Cab Long Bed Single Catalytic Converter 85276
GMC Sierra 2001-2005 6.6L 2500/3500 HD Crew Cab Short Bed Single Catalytic Converter 85278
GMC Sierra 2001-2005 6.6L 2500/3500 HD Extended Cab Long Bed Single Catalytic Converter 85304
GMC Sierra 2001-2005 6.6L 2500/3500 HD Extended Cab Short Bed Single Catalytic Converter 85313
GMC Sierra 2001-2005 6.6L 2500/3500 HD Standard Cab Long Bed Single Catalytic Converter 85301
GMC Sierra 2001-2004 2500/3500 Heavy Duty Crew Cab Long Bed 6.6L Diesel without a Single Stock Catalytic Converter 85302
GMC Sierra 2001-2004 2500/3500 Heavy Duty Crew Cab Short Bed 6.6L Diesel without a Single Stock Catalytic Converter 85286
GMC Sierra 2001-2004 2500/3500 Heavy Duty Extended Cab Long Bed 6.6L Diesel without a Single Stock Catalytic Converter 85306
GMC Sierra 2001-2004 2500/3500 Heavy Duty Extended Cab Short Bed 6.6L Diesel without a Single Stock Catalytic Converter 85305
GMC Truck 1500 1988-1993 Extended Cab Short Bed and Long Bed 6.2L Diesel 85211
GMC Truck 1500 1988-1993 Standard Cab Short Bed and Long Bed 6.2L Diesel 85245
GMC Truck 2500 1988-1993 Extended Cab Short Bed and Long Bed 6.2L Diesel 85211
GMC Truck 2500 1988-1993 Standard Cab Short Bed and Long Bed 6.2L Diesel 85245
GMC Truck 3500 1988-1993 Extended Cab Short Bed and Long Bed 6.2L Diesel 85211
GMC Truck 3500 1988-1993 Standard Cab Short Bed and Long Bed 6.2L Diesel 85245

Doug Thorley Diesel Cat Back Exhaust Systems are available for the following model-years: 06, 05, 04, 03, 02, 01, 00, 99, 98, 97, 96, 95, 94, 93 92, 91, 90, 89, 88.
Please feel free to call toll-free 800.874.8888 or e-mail sales@autoanything.com with any questions. We are delighted to be of assistance in finding the right Performance Exhaust System for your needs.