Exhaust
2015-2017 Roush Mustang GT Black-Tip Axle-Back Exhaust
Roush part # 421834-BLK
$799.99
Roush retail price · part only
Installed at our shop
est. $949.99
Part $799.99 + 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: 2015–2017 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
2015–2017 Roush Performance Mustang GT Black-Tip Axle-Back Exhaust System
Race-Inspired Sound. Stealth Styling. Legendary Roush Performance.
Give your 2015–2017 Mustang GT the aggressive tone and bold rear-end styling it deserves with the Roush Performance Black-Tip Axle-Back Exhaust System. Designed for the 5.0L Coyote V8, this system unlocks a deep, throaty exhaust note while enhancing your Mustang’s look with dual 4-inch black-coated tips.
Key Features:
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Fits 2015–2017 Mustang GT Fastback models with 5.0L V8
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Dual 4" black exhaust tips etched with the Roush Performance logo for a stealthy, aggressive finish
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Straight-through muffler design for a deep, powerful exhaust note without excessive cabin drone
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Mandrel-bent 304 stainless steel construction for strength, flow, and corrosion resistance
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Axle-back configuration — maintains factory catalytic converters and emissions equipment
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No cutting or welding required — easy bolt-on installation
Aggressive Tone That Demands Attention.
The Roush Performance axle-back exhaust system is acoustically engineered to deliver a distinct, race-inspired sound that’s aggressive during acceleration and smooth while cruising. With minimal restriction and optimized flow, it brings out the true character of your Mustang’s V8.
Style That Matches the Sound.
The system’s dual 4-inch black tips add a bold, motorsport-inspired aesthetic to the rear of your Mustang, complementing its modern design while letting everyone know this isn’t just any GT. Finished with the Roush Performance logo, these tips provide a sleek, aggressive look that sets your build apart.
Roush-Built. Performance-Tested.
As with every Roush Performance product, this axle-back exhaust is engineered to meet the same rigorous standards used in our high-performance vehicles. From the materials to the fitment, every detail is designed to ensure long-lasting durability, excellent performance, and unmatched sound.
Upgrade your Mustang GT with the Roush Performance Black-Tip Axle-Back Exhaust — the ultimate combination of tone, style, and Roush engineering.
