Exhaust
2011-2014 Roush Mustang GT Black-Tip Axle-Back Exhaust
Roush part # 421127-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: 2011–2014 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
2011–2014 Roush Performance Mustang GT Black-Tip Axle-Back Exhaust System
Bold Tone. Blacked-Out Style. Proven Performance.
Give your 2011–2014 Mustang GT the signature growl and sleek styling it deserves with the Roush Performance Black-Tip Axle-Back Exhaust System. Engineered for the 5.0L Coyote V8, this system delivers an aggressive, race-inspired tone and enhanced exhaust flow — all finished with dual 4" black tips for a stealthy, head-turning look.
Key Features:
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Fits 2011–2014 Mustang GT models with 5.0L V8
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Dual 4" black exhaust tips etched with the Roush Performance logo for a bold finish
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Straight-through muffler design for aggressive tone without excessive cabin drone
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Mandrel-bent 304 stainless steel for long-lasting durability and corrosion resistance
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Axle-back configuration — retains factory catalytic converters and resonators
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Easy bolt-on installation — no cutting or welding required
Unmistakable Roush Performance Sound.
The Roush Performance axle-back system unleashes a deep, throaty rumble that transforms your Mustang GT into a true street machine. With a straight-through muffler design and unrestricted mandrel bends, this system maximizes flow and amplifies your Mustang’s natural V8 tone without compromising drivability.
Designed for Looks. Built to Perform.
This system doesn’t just sound the part — it looks it, too. Featuring dual 4-inch black-coated tips with laser-etched Roush Performance logos, it brings a sleek, aggressive touch to your rear fascia. The corrosion-resistant 304 stainless steel construction ensures your Mustang looks and sounds great for years to come.
Backed by the Roush Performance Legacy.
Every Roush Performance exhaust system is developed using the same engineering expertise found in our performance vehicles. Precision manufacturing, quality materials, and rigorous testing ensure you get a premium exhaust solution that delivers on sound, performance, and style.
Upgrade your 2011–2014 Mustang GT with the Roush Performance Black-Tip Axle-Back Exhaust and let your V8 roar.
