Dynomax 39311 Exhaust System Kit

Dynomax Ultra Flo Welded Cat-Back System

The Dynomax Ultra Flo Welded Single System is a stainless steel cat-back exhaust kit built for drivers who want a direct-fit performance exhaust upgrade with a straight-through muffler design. Part number 39311 is engineered for select Chevrolet Silverado 1500 and GMC Sierra 1500 applications, including 1999-2007 truck fitments listed below.

Dynomax Ultra Flo Welded systems focus on free-flowing exhaust routing, mandrel-bent tubing, and a deep performance tone while reducing unwanted interior resonance. This makes 39311 a practical choice for a Chevrolet Silverado 1500 exhaust system or GMC Sierra 1500 cat-back exhaust replacement when the goal is improved exhaust flow and a cleaner, performance-oriented sound.

Key Features

• Cat-back exhaust system kit for single-exhaust applications
• 3-inch pipe diameter with stainless steel pipe material
• Straight-through Ultra Flo Welded muffler design
• 100-percent welded stainless steel muffler construction
• Mandrel-bent tubing for consistent exhaust flow
• Round tip shape with angle exit style
• Band clamp design with mounting hardware included
• Kit contents include intermediate pipe, muffler, tail pipe, and clamps
• Compatible with select 1999-2007 Chevrolet Silverado 1500 and GMC Sierra 1500 configurations

Product Details

Dynomax Ultra Flo Welded part number 39311 uses a stainless steel, straight-through muffler with CRF technology to help control cabin resonance while maintaining a performance exhaust note. The system is built as a single cat-back layout with a 3-inch inlet and outlet path, a 16-inch muffler body length, and a polished round-tip style at the exit. For shoppers searching for a 1999-2006 Chevrolet Silverado 1500 cat-back exhaust, 1999-2006 GMC Sierra 1500 exhaust kit, or 2007 Silverado 1500 Classic single exhaust system, this part number matches the listed vehicle configurations.

Fits 2007 Chevrolet Silverado 1500 Classic, N/A. Fits 2007 GMC Sierra 1500 Classic, N/A. Fits 1999-2006 Chevrolet Silverado 1500, N/A. Fits 1999-2006 GMC Sierra 1500, N/A. Fits 1999-2000 Chevrolet Silverado 2500, N/A. Fits 1999-2000 GMC Sierra 2500, N/A.

Common Reasons to Replace

• Restore a damaged or rusted factory exhaust system
• Address restrictive exhaust flow on a stock single-exhaust truck
• Reduce exhaust resonance from an aging muffler
• Replace worn clamps, pipes, or tail sections in one system
• Upgrade to a stainless steel cat-back exhaust for long-term durability

Installation Notes

This system is a bolt-on style exhaust kit for the listed applications. Verify your truck has the correct single-exhaust configuration and under-8600 lb GVW fitment notes before ordering. Check hanger locations, pipe routing, and clearance around the rear axle and suspension during installation. For best results, inspect all joints after initial heat cycling and recheck clamp tightness as needed.

Quality Assurance

Dynomax backs the Ultra Flo Welded muffler design with a Limited Lifetime Warranty and a 90-Day Performance & Sound Guarantee. Part number 39311 is built around welded stainless steel construction and a straight-through performance layout for consistent service in the listed Chevrolet Silverado 1500 and GMC Sierra 1500 applications.