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Doug Thorley Exhaust System

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  • The fastest and easiest way to bolt on extra torque and horsepower
  • Mandrel-bent 16-gauge aluminized steel tubing
  • Includes Aeroflow performance muffler with chrome-plated or 304 Stainless tip(s)
  • Custom-built to your specific make, model, and year vehicle for ideal performance
  • Most vehicles require no cutting or welding
  • Lets out a rumbling exhaust sound
  • Choose dual or single exit
  • 50 State street legal
  • Lifetime Warranty

Doug Thorley's 5 decades of performance exhaust excellence truly show in their current cat-back exhaust systems. The Doug Thorley Exhaust System is a top-quality, performance-enhancing cat-back exhaust that gives you great performance gains, killer looks, and that deep rumble you crave. All this arrives at your door in an affordable system that's super easy to bolt right up in no time.

Doug Thorley Exhausts boast the same core features that made their headers legends: precise engineering, top-quality materials, and exacting fit. The pipes are made from 16 gauge aluminized steel and CNC mandrel bent for optimal flow and minimal backpressure. On the back end is Doug Thorley's Aeroflow muffler which provides maximum performance as well as a mighty growl to match. To top it off, your Doug Thorley Exhaust comes complete with a 304-Stainless or Chrome Plated "Big-Bore" style tip (or tips), laser-etched with the Doug Thorley Exhaust logo.

The Doug Thorley Exhaust is the simplest, fastest way to bolt on great performance. Every system is custom-designed to your specific vehicle for perfect fit and performance, while integrated OEM-style hangers make installation a breeze. Most installations don't require any cutting or welding - the simple "pinch-bolt" design is easy to rig up and makes welding and visible clamps a thing of the past.

Trust your Doug Thorley Exhaust to give you great power, performance, and sound for a lifetime - Thorley warranties your Cat-Back Exhaust System for as long as you own your vehicle.

Doug Thorley Exhaust System Customer Reviews


Overall Rating:

4.2 of 5
Sam P. who drives a GMC Sierra Pickup

It's not as loud as other exhaust's and the instructions are minimal. They should improve instructions. Still, it was pretty easy to install and looks great on my Sierra.