Mishimoto Cat-Back Exhaust Kit Stainless Steel 3" With 4-1/2" Polished Tips Mustang EcoBoost Fastback 2015-2023
Highlights
- T304 Mandrel-Bent Steel
- TIG-Welded Construction
- Minimal Bends = Optimal Flow
- Dual 4-1/2" Double Wall Tips
Mishimoto 3" Stainless Steel Cat-Back Exhaust Kit with 4-1/2" Polished Tips for 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, and 2023 Fastback EcoBoost Mustangs.
This 3-inch Cat-Back Exhaust Kit (MMEXH-MUS4-15) from Mishimoto will give your 2015-2023 Fastback EcoBoost Mustang an aggressive, drone-free sound with subtle turbo! It is a direct fit replacement that mates with various downpipes.
Features and Benefits:
- Direct-fit replacement cat-back exhaust kit
- Full mandrel-bent T304 stainless steel construction
- TIG-welded construction with minimal bends for optimal airflow
- Specially selected oval mufflers offer subtle turbo and exhaust tone
- Aggressive sound with no added drone
- Modular center section with optional 3-inch downpipe-to-exhaust adapter
- Easily mates with Mishimoto EcoBoost Mustang downpipe
- Mates with other stock downpipes and most aftermarket downpipes
- 3 to 2-1/2 inch exhaust split maintains proper exhaust velocity
- Includes dual 4-1/2 inch double-wall polished exhaust tips
- Fits manual and auto transmissions with no extra adapters or brackets
This Mishimoto Exhaust Kit is TIG-welded from mandrel-bent T304 stainless steel with minimal bends for the best sound possible. It has a modular center section with a 3-inch downpipe-to-exhaust adapter that allows it to connect with stock and aftermarket downpipes. This kit (MMEXH-MUS4-15) also comes with a pair of 4-1/2 inch double-wall tailpipes with a gorgeous polished finish to show off your Mustang's new exhaust style!
Kit Includes:
- (x1) Stainless Steel Front Pipe with Slip Joint connection
- (x1) Stainless Steel Y Pipe with Slip Joint connections
- (x2) Stainless Steel Mufflers with Single 4-Inch Double Wall Tips, Polished
- (x1) 3-Inch Slip Joint Clamp
- (x2) 2-1/4 Inch Slip Joint Clamps
Tech Tip: This exhaust will only mate to the stock downpipe, a Mishimoto downpipe, or any aftermarket downpipe with a 2-1/4 inch outlet. Mishimoto has not verified fitment with full 3-inch downpipes.
Please Note: This exhaust kit will NOT fit Convertible models.
Vehicle Fitment:
- 2015-2023 Fastback EcoBoost Mustang
California Residents: Proposition 65 Warning
Related Categories: Mustang Parts, Mustang Exhaust, Mustang Cat Back Exhaust Kits
Installation Difficulty

Intermediate skill is required for this installation.







