13-14 Ford Mustang GT 5.0L V8 Flowmaster 817588 American Thunder Axle-back Exhaust System

Flowmaster American Thunder Axle-back Exhaust System

Part Number: 817588

The Flowmaster American Thunder Axle-back Exhaust System 817588 is designed for 2013-2014 Ford Mustang GT models equipped with the 5.0L V8 engine and delivers the aggressive exhaust tone performance enthusiasts expect from a legendary Flowmaster system. Featuring Super 44 Series chambered mufflers, 3.00-inch mandrel-bent tubing, and large polished stainless steel tips, this axle-back exhaust upgrade enhances the Mustang’s appearance while producing a deep, powerful sound with a moderate interior tone at varying RPM levels. The bolt-on design uses factory hanger locations for a straightforward installation and provides a performance-focused upgrade without replacing the entire exhaust system. Constructed from durable 409 stainless steel and backed by a Flowmaster Lifetime Limited Warranty, this American Thunder exhaust system is built for long-lasting performance and style.

Key Features

• Designed specifically for 2013-2014 Ford Mustang GT 5.0L V8 coupes and convertibles
• Flowmaster American Thunder Series axle-back exhaust system with aggressive exterior sound
• Includes dual Super 44 Series chambered performance mufflers
• Uses large 3.00-inch mandrel-bent tubing for improved exhaust flow
• Features large 4.00-inch polished stainless steel exhaust tips for a premium appearance
• Dyno tuned for performance-oriented sound and exhaust efficiency
• Direct bolt-on design uses factory hanger locations
• Includes necessary clamps and hardware for installation
• Manufactured from durable 409 stainless steel construction

Benefits

• Provides a deeper, more aggressive exhaust note that enhances the Mustang GT driving experience
• Improves the appearance of the rear of the vehicle with polished stainless steel tips
• Offers reliable performance from Flowmaster’s proven Super 44 Series muffler technology
• Maintains a comfortable interior tone while delivering an upgraded exterior sound
• Provides a simple upgrade path compared to replacing the complete exhaust system
• Designed for a clean factory-style fitment with an aftermarket performance advantage
• Backed by Flowmaster’s Lifetime Limited Warranty for long-term confidence

Product Specifications

• Brand: Flowmaster
• Part Number: 817588
• Product Type: Axle-back Exhaust System
• Exhaust Series: American Thunder
• Vehicle Drive Type: 2WD
• Engine Compatibility: 5.0L V8
• Material: 409 Stainless Steel Exhaust Tubing and Muffler Bodies
• Exhaust Tip Material: 304 Stainless Steel
• Exhaust Tip Finish: Polished Stainless Steel
• Exhaust Tip Color: Silver
• Exhaust Tip Diameter: 4.00 inches
• Exhaust Tip Length: 5.25 inches
• Exhaust Tip Quantity: 2
• Tail Pipe Outlet Diameter: 3.00 inches
• Main Piping Diameter: 3.00 inches
• Exit Style: Dual Rear Exit
• Muffler Quantity: 2
• Muffler Series: Super 44 Series
• Muffler Type: Chambered
• Muffler Body Shape: Oval
• Muffler Body Size: 13.00 inches long x 9.50 inches wide x 4.00 inches high
• Muffler Finish: Black High-Temperature Paint Finish
• Sound Level: Aggressive
• Clamping Type: Flat Band
• Clamps Included: Yes
• Hangers Included: Yes
• Catalytic Converter Included: No
• Emission Code: 5
• CARB Compliant: Yes
• UPC: 700042027576

Install Difficulty level

This Flowmaster American Thunder Axle-back Exhaust System is designed for an easy bolt-on installation and uses factory hanger locations, making it a beginner-friendly exhaust upgrade. Installation can typically be completed in approximately 1 hour with basic hand tools and proper vehicle support equipment.

Vehicle Fitment

2013-2014 Ford Mustang GT 5.0L V8 Coupe and Convertible models.

For questions about this product or to report product description inaccuracies, contact the MPT Performance experts at (407) 636-7077 or by email.