Roush Exhaust Systems

Fits 2011–2014 Ford Mustang V8 GT and GT500

Part #: 421127

Overview

The Roush Dual Axle-Back Exhaust with Round Tips is a high-performance upgrade designed specifically for the 2011-2014 Ford Mustang V8 models, including the GT and GT500 variants. Crafted to enhance both sound and airflow, this exhaust system is ideal for Mustang enthusiasts seeking a more aggressive tone and improved exhaust flow without sacrificing daily comfort. Made from durable materials, it offers increased longevity and reliable performance, making it a popular choice for those looking to elevate their vehicle’s auditory presence and overall driving experience.

Key Features

This axle-back exhaust system features a thoughtfully engineered open-chambered muffler design that delivers a distinctive, aggressive sound profile. Its round tips add a sleek, sporty aesthetic to the rear of your Mustang, complementing its performance-oriented look. The system is designed for easy bolt-on installation, fitting directly onto the factory exhaust mounting points, and requires no modifications. Constructed from high-quality stainless steel, it ensures resistance to corrosion and long-lasting durability. The design minimizes in-cabin drone at cruising speeds, providing a refined driving experience even during extended drives. The increased airflow support helps your vehicle breathe better, potentially contributing to slight performance improvements and a more responsive throttle.

Construction & Design

The exhaust features precision-welded stainless steel components with a focus on durability and performance. The open-chambered muffler design is engineered to produce a deep, aggressive exhaust note that stands out without being overly intrusive. The round tips are finished with a polished appearance, adding a refined touch to the vehicle’s rear end.

Driving Feel & Feedback

This exhaust system enhances the auditory character of your Mustang, providing a more assertive and sporty sound that complements its V8 engine. The improved airflow can support better exhaust scavenging, contributing to a more lively and engaging driving experience. The system is designed to reduce drone at cruising speeds, ensuring comfort during daily driving while delivering an unmistakable performance tone when accelerating.

Installation & Fitment

The Roush Axle-Back is a straightforward bolt-on upgrade that fits directly onto the factory exhaust mounting points of the specified Mustang models. No cutting or welding is required, making it accessible for DIY installation or professional service. Proper fitment is ensured for a seamless, secure connection, and the system is designed to maintain factory-like fit and finish.

What’s Included

The package includes the dual axle-back exhaust system with polished round tips, clamps, and all necessary hardware for installation.