Dynomax 39442 Exhaust System Kit

Dynomax Ultra Flo Welded Cat-Back System

Dynomax Ultra Flo Welded Single System 39442 is a premium cat-back exhaust kit built for 2007-2008 Chevrolet Avalanche, 2007-2008 Chevrolet Suburban 1500, and 2007-2008 GMC Yukon XL 1500. It uses a 3-inch stainless steel mandrel-bent layout with a single-exit, straight-through muffler design for a performance-focused exhaust upgrade.

The Ultra Flo Welded line emphasizes 100-percent welded construction and a stainless steel muffler body with Continuous Roving Fiberglass (CRF) technology to reduce interior resonance while keeping a deeper exhaust tone. Part number 39442 is a direct-fit style system for drivers looking for a bolt-on exhaust solution for these full-size GM SUVs.

Key Features

• Part number 39442
• Cat-back exhaust system kit with single exhaust layout
• Fits 2007-2008 Chevrolet Avalanche, Chevrolet Suburban 1500, and GMC Yukon XL 1500
• 3-inch pipe diameter with mandrel bends
• Stainless steel pipe and muffler construction
• Straight-through Ultra Flo Welded muffler design
• Round, rolled tip shape with angle exit style
• Includes intermediate pipe, muffler, tail pipe, clamps, and instruction sheet

Product Details

Dynomax Ultra Flo Welded Single System 39442 is engineered as a performance exhaust system for drivers who want a cleaner-flowing cat-back setup on a Chevrolet Avalanche, Chevrolet Suburban 1500, or GMC Yukon XL 1500. The straight-through muffler architecture is paired with welded stainless steel construction to support durability in daily driving and towing use. The system is configured as a single exhaust with a 3-inch inlet and outlet, band clamp connections, and a natural stainless finish.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What This Exhaust System Helps Address

• Restrictive factory exhaust flow on 2007-2008 Chevrolet Avalanche and Suburban 1500 applications
• Muted exhaust tone when a deeper performance sound is desired
• Corrosion concerns from aging OE exhaust components
• Exhaust resonance inside the cabin during acceleration
• Worn or damaged cat-back sections that need replacement

Installation Notes and Tips

Install 39442 as a cat-back system using the included clamps and instruction sheet. Verify clearance around the frame, rear suspension, and exit path before final tightening. Because this is a single-exit system with an angle exit location, align the tail pipe and tip carefully to maintain proper fitment and appearance on the Chevrolet Avalanche, Chevrolet Suburban 1500, or GMC Yukon XL 1500.

For best results, confirm vehicle year and model before installation. This system is listed for 2007-2008 applications only.

Quality Assurance

Dynomax backs the Ultra Flo Welded muffler design with a Limited Lifetime Warranty and a 90-Day Performance & Sound Guarantee. The Ultra Flo Welded product line is built around welded stainless steel construction and a straight-through flow path for consistent performance-focused exhaust service.