11-12 Ford Mustang GT 5.0L Flowmaster 817516 Outlaw Axle-back Exhaust System

Flowmaster Outlaw Axle-Back Exhaust System - Part #817516

Upgrade the sound and performance of the 2011-2012 Ford Mustang GT 5.0L with the Flowmaster Outlaw Axle-Back Exhaust System, engineered for enthusiasts who demand an aggressive muscle car exhaust note without sacrificing factory-style fitment. Designed as a direct replacement for the original rear mufflers, this premium axle-back system features race-proven Outlaw chambered mufflers and mandrel-bent 3.00-inch stainless steel tubing to help maximize exhaust flow, improve throttle response, and deliver the greatest performance gains possible from an axle-back exhaust system. Finished with large 4.00-inch polished 304 stainless steel tips embossed with the Flowmaster logo, this system enhances both the appearance and sound of the Mustang. Complete with all required installation hardware, factory-style hangers, and detailed instructions, this performance exhaust is an excellent choice for drivers looking to unlock an unmistakable exhaust tone while maintaining an OEM-quality fit and finish.

Key Features

• Direct-fit axle-back exhaust system for factory-style installation.
• Race-proven Flowmaster Outlaw chambered mufflers.
• 3.00-inch mandrel-bent 409 stainless steel tubing for improved exhaust flow.
• Large 4.00-inch polished 304 stainless steel exhaust tips with embossed Flowmaster logo.
• Aggressive exterior and interior exhaust tone.
• Dyno tuned to maximize horsepower and performance potential from an axle-back system.
• Factory hanger locations for precise fitment.
• Includes clamps, hangers, hardware, and installation instructions.
• Dual rear exit configuration.
• Premium stainless steel construction for long-lasting durability.

Benefits

• Produces an unmistakable aggressive muscle car exhaust sound.
• Helps improve exhaust flow, throttle response, and overall driving excitement.
• Enhances the rear appearance with oversized polished stainless steel exhaust tips.
• Installs using factory mounting locations with minimal modifications.
• Built from corrosion-resistant stainless steel materials for years of dependable performance.
• Backed by Flowmaster's Lifetime Limited Warranty for long-term confidence.
• An ideal upgrade for Mustang owners seeking premium performance, aggressive styling, and proven Flowmaster quality.

Product Specifications

• Part Number: 817516
• Product Type: Axle-Back Exhaust System
• Exhaust Series: Outlaw
• Sound Level: Aggressive
• Main Tubing Diameter: 3.00 inches
• Inlet Diameter: 2.75 inches
• Inlet Style: Clamp-On
• Exit Style: Dual Rear Exit
• Tailpipe Quantity: Dual
• Pipe Material: 409 Stainless Steel
• Pipe Color: Black
• Muffler Material: 409 Stainless Steel
• Muffler Finish: Black High-Temperature Paint
• Muffler Type: Chambered Outlaw
• Muffler Quantity: 2
• Exhaust Tip Material: 304 Stainless Steel
• Exhaust Tip Finish: Polished
• Exhaust Tip Color: Silver
• Exhaust Tip Diameter: 4.00 inches
• Exhaust Tip Length: 5.25 inches
• Exhaust Tip Shape: Round
• Exhaust Tip Edge: Rolled Angle Cut
• Exhaust Tip Connection: Welded
• Clamps Included: Yes
• Hangers Included: Yes
• Catalytic Converter Included: No
• Drive Type: 2WD
• Finish: Natural
• UPC: 700042025176

Install Difficulty Level

Easy. This direct-fit axle-back exhaust system is designed to utilize the factory mounting points and factory-style connections, making installation straightforward for most DIY enthusiasts with basic hand tools. All necessary clamps, hangers, hardware, and detailed instructions are included. Under ideal shop conditions, installation can be completed in approximately 30 minutes, making it one of the quickest performance upgrades available for the Mustang.

Vehicle Fitment

Fits the following vehicles:

• 2011 Ford Mustang GT Coupe – 5.0L V8
• 2011 Ford Mustang GT Convertible – 5.0L V8
• 2012 Ford Mustang GT Coupe – 5.0L V8
• 2012 Ford Mustang GT Convertible – 5.0L V8
• 2012 Ford Mustang Boss 302 Coupe – 5.0L V8

If there are any questions about this product or to report any product description inaccuracies, please contact the MPT Performance experts at (407) 636-7077 or by email for knowledgeable product assistance.