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Roush Performance 421837 Axle-Back Exhaust System with Chrome Tips

(2015-2023 Ford Mustang)

Manufacturer

Picture for manufacturer Roush Performance

Part Number

421837
20 reviews
Sale Price

$729.99

In Stock (5)

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Usually delivered within 2 days

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Product Details

The Roush Performance 421837 Axle-Back Exhaust System delivers an aggressive, throaty sound for 2015+ Mustang 2.3L EcoBoost and 3.7L V6 engines. This complete bolt-on exhaust kit transforms your Mustang's exhaust note with high-flow chambered mufflers that eliminate unwanted drone at cruising speeds while providing a deep, raspy tone under acceleration.

Key Features:

  • T-304 stainless steel construction for superior corrosion resistance and durability
  • Mandrel-bent tubing maintains consistent 2.25-inch diameter for maximum flow and reduced backpressure
  • Open-chambered muffler design increases airflow and performance without cabin boom
  • Dual 4-inch round chrome-flashed exhaust tips with embossed Roush logo
  • Heat-resistant chrome finish prevents discoloration from exhaust temperatures
  • Direct bolt-on installation using factory mounting points—no welding required
  • Compatible with OEM rear valance for clean, factory appearance
  • Backed by Roush Limited Lifetime Warranty

What's Included:

  • Driver side muffler assembly
  • Passenger side muffler assembly
  • Two chrome exhaust tips
  • Four stainless steel clamps
  • Complete installation hardware and instructions

This is the same exhaust system featured in the Roush Level 2 Performance Pack. Installation requires cutting the stock mufflers and clamping the new assemblies in place, typically taking about one hour with light to moderate mechanical skill.

Products specifications

Fits

2015-2023 Ford Mustang

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