XForce ES-FM15VMK-CBS Varex 3″ Cat-Back Exhaust – Ford Mustang GT 5.0L V8

XForce ES-FM15VMK-CBS Varex Cat-Back Exhaust for Ford Mustang GT 5.0L V8

Give your Ford Mustang GT S550 the exhaust system it deserves with the XForce ES-FM15VMK-CBS Varex Cat-Back Exhaust.

Designed for the 2015–2017 Ford Mustang GT 5.0L Coyote V8 Fastback, this system combines large-diameter 3-inch stainless-steel pipework with XForce Varex valve-controlled rear mufflers. The result is a performance exhaust system that gives Mustang owners greater control over exhaust volume while delivering the distinctive sound expected from the 5.0-litre V8.

The system uses twin 3-inch pipework and a straight-through exhaust design to promote efficient exhaust gas flow. The 304 stainless-steel construction provides excellent durability and resistance to corrosion, making it well suited to both road-going performance cars and modified Mustang builds.

Varex Valve-Controlled Mufflers

The key feature of the ES-FM15VMK-CBS is its Varex valved rear mufflers. The valves allow the exhaust character and volume to be adjusted, giving the driver greater control over the Mustang’s soundtrack.

When you want a more refined exhaust note, the valves can provide a quieter configuration. Open the valves and the system delivers a significantly more aggressive V8 exhaust sound.

Performance-Focused 3-Inch Design

The system uses 3-inch / 76 mm exhaust pipework throughout the cat-back section. The mandrel-bent construction helps maintain a consistent internal diameter through the bends, supporting efficient exhaust flow.

The system incorporates an oval centre resonator and round Varex rear mufflers, together with a straight-through design intended to reduce restriction and enhance the performance character of the Mustang GT.

Premium 304 Stainless Steel Construction

XForce manufactures this system using 304 stainless steel, providing a strong and corrosion-resistant material suitable for high-temperature exhaust applications.

The system also features TIG-welded construction and polished stainless-steel exhaust tips for a high-quality finish.

Key Features

• XForce Varex valved cat-back exhaust system
• Part number: ES-FM15VMK-CBS
• Designed for Ford Mustang GT S550 5.0L V8
• Suitable for Fastback/Coupe models
• Twin 3-inch / 76 mm exhaust pipework
• 304 stainless-steel construction
• TIG-welded construction
• Oval centre resonator
• Round Varex valve-controlled rear mufflers
• Remote-controlled exhaust valves
• Dual 4-inch polished stainless-steel tips
• Straight-through exhaust design
• Performance-oriented exhaust flow
• Adjustable exhaust volume
• Supplied with required gaskets, nuts and bolts for fitment
• Will not fit Convertible models

Why Choose XForce ES-FM15VMK-CBS?

The XForce ES-FM15VMK-CBS is an excellent option for Mustang GT owners looking to improve both the appearance and sound of their S550. The Varex valve technology gives you more control over the exhaust note, while the 3-inch stainless-steel system provides the aggressive appearance and performance-focused design expected from a high-quality aftermarket exhaust.

Whether you are building a performance Mustang, upgrading the factory exhaust or simply want greater control over your 5.0L Coyote V8’s sound, the XForce Varex system provides a versatile solution.

Fitment Important

This exhaust is specifically intended for the Ford Mustang GT S550 5.0L V8 Fastback/Coupe.

It does not fit Ford Mustang Convertible models.

Please verify the vehicle’s year, model, engine and body style before ordering.

4. Technical Specifications

The 3-inch diameter, 304 stainless construction, Varex mufflers and Fastback-only application are supported by published product specifications.