Dynomax 54778 Exhaust Muffler Assembly - Right

Dynomax Ultra Flo Welded Direct Fit Muffler

Dynomax Ultra Flo Welded Direct Fit part number 54778 is a stainless steel exhaust muffler assembly built for the 2011-2015 Jeep Grand Cherokee. It uses a straight-through absorption design to maintain exhaust flow while delivering a deep performance tone, making it a direct OE replacement for drivers upgrading the factory muffler on the Jeep Grand Cherokee.

Key Features

• Direct fit exhaust muffler assembly for 2011-2015 Jeep Grand Cherokee applications
• Part number 54778
• 409 stainless steel body with natural finish
• 100-percent welded construction for added durability
• Straight-through, absorption-style design
• Continuous Roving Fiberglass (CRF) technology to reduce interior resonance
• Deep performance tone without excessive cabin drone
• Single center inlet with offset outlet configuration

Product Details

The Dynomax Ultra Flo Welded line focuses on welded stainless steel construction and unrestricted exhaust flow. This muffler assembly is engineered with a 2.5-inch inlet, 3-inch outlet, and an oval body profile, with dimensions that support a direct OE replacement layout on the Jeep Grand Cherokee. The Ultra Flo Welded design is intended for performance-minded exhaust service where consistent flow and controlled sound are priorities. Part number 54778 is a fitment-based solution for 2011-2015 Jeep Grand Cherokee models, including right-side applications listed in the fitment data.

What This Muffler Helps Address

• Replacing a rusted, damaged, or worn factory muffler
• Restoring exhaust function after corrosion or internal failure
• Reducing unwanted interior resonance from an aftermarket or aging exhaust
• Improving exhaust flow on a Jeep Grand Cherokee performance build
• Updating the sound profile to a deeper performance tone

Installation Notes

Fits 2011-2015 Jeep Grand Cherokee, right. Fits 2011-2015 Jeep Grand Cherokee, N/A. Verify inlet and outlet sizing, offset configuration, and overall length against the existing exhaust layout before installation. This part uses pipe connection inlet and tip-welded spout outlet construction, so alignment with the vehicle’s exhaust routing is important for proper fitment.

Quality Assurance

Dynomax backs the Ultra Flo Welded muffler line with a Limited Lifetime Warranty and a 90-Day Performance & Sound Guarantee. The welded stainless steel construction and CRF technology are part of the brand’s performance-focused exhaust design approach for the Jeep Grand Cherokee and similar direct-fit applications.