2001-2004.5 Duramax 4" Downpipe Back Exhaust - No Muffler (431112)

Flo-Pro Exhausts are designed to fit all wheelbase & cab configurations unless otherwise specified.

The 431112 is a 4" downpipe back race exhaust system for the 2001-2007 Duramax Trucks. This will replace the restrictive OE exhaust system with a 4" high-flow straight pipe exhaust system. This kit doesn't include a muffler and is intended for track applications. Just like all of Flo-Pro Exhaust kits, it will come with all the required clamps, pre-weld contour bent hangers, and stronger flanges to help you sail through the installation process. It not only sounds great but will also improve mileage, torque, and throttle response.

Part Number: 431112

• 4" Downpipe Back Exhaust system.
• No Muffler
• Aluminized Steel & Stainless Steel Options
• Single Side Exit
• Easy Install - Mounts to OE Hangers

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