Dynomax 39517 Exhaust System Kit

Dynomax Ultra Flo Welded Cat-Back Exhaust

Dynomax Ultra Flo Welded part number 39517 is a performance cat-back exhaust system built for the 2012-2018 Jeep Wrangler and 2018 Jeep Wrangler JK applications listed below. It uses stainless steel construction, a straight-through muffler design, and a rear exit layout to support freer exhaust flow while maintaining a controlled performance tone.

The Ultra Flo Welded line focuses on welded stainless construction and straight-through muffler architecture. For Jeep Wrangler owners looking for a cat-back exhaust upgrade with mandrel-bent piping and a single-exit layout, Dynomax 39517 is built around durability, flow, and a cleaner exhaust path.

• Brand: Dynomax Ultra Flo Welded Single System
• Part number: 39517
• Cat-back exhaust system for Jeep Wrangler and Jeep Wrangler JK fitments
• Stainless steel pipe and muffler construction
• Straight-through muffler design for reduced restriction
• Mandrel-bent piping for consistent exhaust diameter through bends
• Single exhaust with rear exit and straight exit style
• Round tip shape with polished tip finish
• Mounting hardware included

Detailed Product Overview

Dynomax 39517 is a premium exhaust system kit that replaces the factory cat-back section with a stainless steel setup engineered for performance use. The system includes intermediate pipes, muffler, tail pipe, tip, and clamps, and it uses a 2.5-inch pipe diameter with a 3.0-inch outlet. The Ultra Flo Welded muffler design is straight-through and uses Continuous Roving Fiberglass technology to help control interior resonance while keeping a deeper exhaust note.

For shoppers searching for a Jeep Wrangler cat-back exhaust, Jeep Wrangler JK exhaust system, or Dynomax 39517 stainless steel performance exhaust, this part is built for 2012-2017 Jeep Wrangler and 2018 Jeep Wrangler JK applications. It is a single exhaust system with a rear exit layout and a performance-grade stainless steel construction.

What This Exhaust System Helps Address

• Restrictive factory exhaust flow on a Jeep Wrangler or Jeep Wrangler JK
• Excess interior resonance from a performance exhaust upgrade
• Corrosion concerns associated with lower-grade exhaust materials
• Need for a direct-fit cat-back replacement with a rear exit layout
• Factory exhaust tone that does not match a performance-oriented build

Installation Notes and Fitment

Fits 2018 Jeep Wrangler JK, N/A. Fits 2012-2017 Jeep Wrangler, N/A. Confirm the vehicle’s exhaust configuration and underbody clearance before installation. This system uses band-style clamps and mandrel-bent stainless piping for a bolt-on style installation.

Part number 39517 is a direct fit for the listed Jeep Wrangler applications and is commonly searched as a Dynomax Jeep Wrangler exhaust system or Jeep Wrangler JK cat-back exhaust.

Quality Assurance

Dynomax backs Ultra Flo Welded mufflers with a Limited Lifetime Warranty and a 90-Day Performance & Sound Guarantee. The welded stainless steel construction is designed for long-term durability in performance exhaust service.