The Dynomax 39378 is an ultra flo welded cat-back single exhaust system for 2001-2007 Chevrolet Silverado 2500 HD Classic, Silverado 2500 HD, GMC Sierra 2500 HD Classic, Sierra 2500 HD equipped with the 6.0L, 8.1L engine options. Built from stainless steel with a natural finish, it is engineered to restore proper exhaust flow and provide a direct-fit installation.

Dynomax 39378 Features:

• Material: Stainless Steel
• Finish: Natural
• Pipe Diameter: 4 in.
• Length: 22 in.
• Bend Type: Mandrel
• System Style: Cat Back
• System Type: Single
• Clamp Count: 4

Dynomax 39378 Kit Contents:

• Intermediate Pipe
• Muffler
• Tail Pipe
• Tip
• Clamps

Why Choose the Dynomax 39378:

• Includes DynoMax Ultra Flo welded muffler, pipes, tip and clamps.
• Direct-fit bolt-on pre-assembled solution with welded hangers, pipes and clamps for easy installation that doesn't require specialized fabrication and/or welding.
• 4-in. Stainless-steel tubing with mandrel bends improves flow capacity over traditional bends while increased pipe diameter from OE sizes increases flow and power.
• Straight-through design ensures unrestricted exhaust flow and reduces back pressure; dyno proven to flow up to 2,200 SCFM.
• Exclusive Continuous Roving Fiberglass (CRF) technology absorbs unwanted interior resonance while maintaining a deep performance tone.
• Muffler features stainless-steel construction with a micro-finish for lifelong protection and 100% welded design for maximum durability.