Exhaust
2015-2026 Roush Mustang V6 & Ecoboost Black-Tip Axle-Back Exhaust
Roush part # 421837-BLK
$729.99
Roush retail price · part only
Installed at our shop
est. $879.99
Part $729.99 + about 1 hr labor at $150/hr ($150.00).
Estimate only — shop supplies and sales tax not included. We confirm the final installed price for your exact vehicle before any work.
Fits: 2015–2026 Mustang
MustangInstalled at our East Bridgewater shop, or shipped anywhere in the US. Prefer to talk? 508-715-3554
- Genuine ROUSH Performance part, from an authorized Gold Dealer
- Installed by Ford specialists at our East Bridgewater shop
- Roush retail price. Installed price estimated up front, confirmed before work
Prices and availability subject to change. Prices updated October 2, 2026.
Details & specs
2015–2026 Roush Performance Mustang V6 & EcoBoost Black-Tip Axle-Back Exhaust System
Sharper Sound. Stealth Look. Proven Roush Performance.
Awaken your 2015–2026 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.
Key Features:
-
Fits 2015–2026 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
Sound That Matches Your Drive.
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.
Style That Sets You Apart.
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.
Built with Purpose. Backed by Performance.
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.
Upgrade your Mustang V6 or EcoBoost with the Roush Performance Black-Tip Axle-Back Exhaust — the perfect combination of sound, style, and street-ready performance.
