Dynomax 19421 Exhaust System Kit

Dynomax Ultra Flo Welded Cat-Back System

Dynomax Ultra Flo Welded Single System Part Number 19421 is a cat-back exhaust system kit built for the 2005-2010 Jeep Grand Cherokee and 2006-2010 Jeep Commander. It uses a straight-through muffler design, 2.5-inch piping, and a 3-inch round stainless steel tip to deliver a performance-focused exhaust upgrade with a clean rear exit layout.

The Ultra Flo Welded line emphasizes fully welded stainless steel construction and a straight-through internal path. Dynomax pairs that design with Continuous Roving Fiberglass technology to reduce interior resonance while maintaining a deeper exhaust note. For shoppers searching for a Jeep Grand Cherokee cat-back exhaust or a Jeep Commander performance exhaust system, Part Number 19421 provides a direct-fit solution for the listed applications.

• Fits 2005-2010 Jeep Grand Cherokee, N/A
• Fits 2006-2010 Jeep Commander, N/A
• Cat-back single exhaust system with rear exit
• 2.5-inch inlet and 2.5-inch tail pipe diameter
• Straight-through Ultra Flo Welded muffler design
• Stainless steel muffler and tip construction
• Mandrel-bent pipe sections for consistent flow
• Round, non-rolled 3-inch tip
• Mounting hardware included

Performance-Focused Construction

This system is built around a welded stainless steel muffler with a straight-through flow path to reduce restriction in the exhaust stream. The aluminized steel piping, mandrel bends, and rear-exit single exhaust layout support a clean installation on the Jeep Grand Cherokee and Jeep Commander platforms covered by this part number. Part Number 19421 is a practical choice for drivers replacing a worn factory exhaust or upgrading to a more performance-oriented cat-back system.

Common Reasons to Replace the Exhaust

• Rust, corrosion, or leaks in the factory exhaust
• Restricted exhaust flow from an aging muffler or pipe section
• Excessive cabin resonance from a damaged or inefficient system
• Need for a direct-fit cat-back exhaust upgrade on a Jeep Grand Cherokee or Jeep Commander
• Worn tail pipe or tip appearance at the rear of the vehicle

Installation Notes

All Dynomax performance exhaust systems are designed for bolt-on installation. This kit includes a flanged intermediate pipe, muffler, tail pipe, tip, and clamps, and it uses a 2.5-inch inlet/outlet configuration. Verify vehicle year and model before installation, and confirm exhaust routing and hanger alignment on the 2005-2010 Jeep Grand Cherokee or 2006-2010 Jeep Commander.

Quality Assurance

Dynomax backs the Ultra Flo Welded muffler design with a Limited Lifetime Warranty and a 90-Day Performance & Sound Guarantee. Part Number 19421 is part of the Ultra Flo Welded Single System line, built for long-term durability and consistent exhaust performance.