ROUSH 422092 Cat-Back Exhaust Kit for 2015–2017 Mustang GT

The ROUSH 422092 cat-back exhaust is built for S550 Mustang GT owners who’ve had enough of the quiet, choked-up factory exhaust. If you're looking to wake up your 5.0L and get that classic muscle growl while picking up a bit more flow and throttle response, this kit checks all the right boxes.

Compared to stock, this system flows better thanks to its straight-through mufflers and mandrel-bent tubing. It’s made from high-quality stainless and engineered for a deep, aggressive tone that doesn’t drone at cruising speed. Whether you’re on the street or at the strip, this setup delivers a better-sounding, better-performing Mustang.

Key Features & Benefits

• Mandrel-Bent Stainless Steel Tubing – Ensures consistent diameter and high flow throughout the system.
• Straight-Through Performance Mufflers – Improve exhaust tone and flow while keeping things livable in the cabin.
• Aggressive Quad Tip Look – Comes with ROUSH-branded 4" polished tips for a clean finish out back.
• OEM-Quality Fit and Finish – Designed to bolt up with zero drama and deliver long-term durability.

Technical Specifications

• Material: 304 stainless steel throughout—resists corrosion and built to last
• Weight Savings: Slightly lighter than stock system, depending on OEM setup
• Adjustability: Not required—system is designed to fit like OEM
• Additional Required Components: None—comes complete with hardware
• Part Number: 422092

Who This is For

If you’re running a 2015–2017 Mustang GT and want better sound and flow without cutting or tuning, this system’s for you. It’s a bolt-on upgrade for guys who want more out of their Coyote but don’t want to mess with active valves or custom fab work. Works with stock or performance headers.

Interested in newer-gen catbacks? Check out the full line of 2024-2025 Mustang GT catback exhaust systems. Want to stick with the ROUSH name? Browse more ROUSH catback options for the latest models.

Fitment & Installation Notes

• Vehicle Compatibility:
  • 2015–2017 Ford Mustang GT (Coupe and Convertible)
  • Excludes EcoBoost, V6, and GT models with factory active exhaust
• Direct Fitment or Requires Modifications:
  • Direct bolt-on fit to factory connection points
  • No cutting or welding required
• Installation Requirements:
  • No tuning or ECU reflash needed
  • All clamps and hardware are included
  • Professional installation recommended for best results and alignment
• Explicit Warnings:
  • This system is not designed for GT models with factory active exhaust
  • It’s a full replacement—don’t try to piece it together with other OEM or third-party parts
  • If you want quad tips on a non-quad valence, you’ll need to source a compatible rear diffuser

This ROUSH system hits the sweet spot for guys who want that signature V8 sound with a quality build and zero hassle. It’s a tried-and-true setup for 2015–2017 GTs that want to drop the stock drone and pick up real tone.