Roush 421145-BLK Black-Tip Axle-Back Exhaust System for 2011-14 Ford Mustang V6

Vehicle Fitment

• 2011-2014 Ford Mustang (3.7 L V6, all trims)

Features

• Axle-back configuration - retains factory catalytic converters and hangers
• Dual 4" black-coated stainless steel tips with Roush logo for premium rear styling
• Mandrel-bent 409 stainless steel tubing for improved exhaust flow and durability
• Open-chamber muffler design delivers a deeper, more aggressive tone with minimal in-cab drone
• Bolt-on installation with factory hangers - no cutting or welding required
• Designed specifically for the 3.7 L V6 Mustang to provide enhanced sound and aesthetic appeal
• Corrosion-resistant finish for long-term performance in varied environments
• Backed by a limited warranty from Roush for manufacturing quality

Specifications

• Part number: 421145-BLK
• Exhaust tip diameter: 4" each (dual exit)
• Tubing material: 409 stainless steel
• Finish: Black-coated stainless steel tips
• Application: 2011-2014 Ford Mustang V6 (3.7 L engine)

Included Components

• 1x left-side muffler assembly with black 4" tip
• 1x right-side muffler assembly with black 4" tip
• 2x clamps for final connection
• Installation instructions

Product Description

The Roush 421145-BLK Black-Tip Axle-Back Exhaust System is engineered for the 2011-2014 Ford Mustang equipped with the 3.7 L V6 engine. It replaces the factory rear section with premium components designed to enhance both the appearance and sound of your Mustang. The dual 4" black stainless steel tips and open-chamber muffler design combine to deliver a deeper, more aggressive exhaust note while retaining everyday drivability.

With bolt-on installation that uses factory hangers and mounting points, the upgrade process is straightforward - no cutting or welding required. The mandrel-bent 409 stainless steel tubing enhances exhaust flow and resists corrosion, while the black coated tips add a custom, stealth finish to the rear profile of your Mustang.

Ideal for V6 Mustang owners seeking an elevated sound and upgraded look without the complexity of a full cat-back or race-only system, this Roush kit offers a high-quality balance of performance, style and fitment. After installation it is recommended to verify fit of the tips and alignment of the system to ensure optimal clearance and sound quality.