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Roush Axle Back Exhaust Kit Black Tips (2015 - 2026 Mustang Ecoboost / V6) 421837-BLK

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Item#:
421837-blk
Price: $674.99
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Awaken your 2015–2025 Mustang V6 or EcoBoost with the Roush Performance Black-Tip Axle-Back Exhaust System — a bold upgrade that delivers aggressive tone, enhanced flow, and motorsport-inspired styling. Whether you're driving a 3.7L V6 or 2.3L EcoBoost, this system amplifies your Mustang’s performance character with a rich, throaty sound and head-turning rear-end presence.
 
Designed with performance in mind, the Roush Performance Axle-Back Exhaust gives your V6 or EcoBoost Mustang a more aggressive exhaust tone that enhances your driving experience without unwanted drone. The straight-through mufflers and smooth mandrel bends provide improved flow and a sporty, race-ready growl — all while maintaining comfort inside the cabin.
 
With dual 4-inch black tips and precision-crafted components, this system doesn’t just sound the part — it looks it. The stealthy finish and bold Roush Performance branding give your rear fascia a clean, performance-focused appearance that stands out from stock.
 
Like every Roush Performance product, this axle-back system is engineered with the same attention to detail, durability, and precision that defines our performance heritage. It’s built to perform — and built to last.

Features:

  • Fits 2015–2025 Mustang V6 and 2015–2025 Mustang EcoBoost Fastback models

  • Dual 4" black exhaust tips with laser-etched Roush Performance logos for a sleek, aggressive finish

  • Straight-through muffler design for a deeper, more powerful exhaust note

  • Mandrel-bent 304 stainless steel for durability and optimized exhaust flow

  • Axle-back design — retains factory catalytic converters and emissions components

  • Bolt-on installation — no cutting or welding required

 

Fitment

- 2015 Ford Mustang V6

- 2016 Ford Mustang V6

- 2017 Ford Mustang V6

- 2018 Ford Mustang V6

- 2019 Ford Mustang V6

- 2020 Ford Mustang V6

- 2021 Ford Mustang V6

- 2022 Ford Mustang V6

- 2023 Ford Mustang V6

- 2024 Ford Mustang V6

- 2025 Ford Mustang V6

- 2015 Ford Mustang EcoBoost

- 2016 Ford Mustang EcoBoost

- 2017 Ford Mustang EcoBoost

- 2018 Ford Mustang EcoBoost

- 2019 Ford Mustang EcoBoost

- 2020 Ford Mustang EcoBoost

- 2021 Ford Mustang EcoBoost

- 2022 Ford Mustang EcoBoost

- 2023 Ford Mustang EcoBoost

- 2024 Ford Mustang EcoBoost

- 2025 Ford Mustang EcoBoost

CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov