05-10 Ford Mustang 4.6L V8 Flowmaster 817515 Outlaw Cat-back Exhaust System

Flowmaster Outlaw Cat-Back Exhaust System for 2005-2010 Ford Mustang GT 4.6L & GT500 5.4L - Aggressive Sound

Part Number: 817515

The Flowmaster Outlaw Cat-Back Exhaust System (817515) is engineered for Mustang enthusiasts looking to unlock an unmistakable, race-inspired exhaust tone while improving overall exhaust flow and performance. Designed specifically for 2005-2010 Ford Mustang GT 4.6L and GT500 5.4L models, this premium bolt-on exhaust system features mandrel-bent 409 stainless steel tubing, legendary Outlaw Series chambered mufflers, and large polished 304 stainless steel exhaust tips for an aggressive appearance. The dyno-tuned design helps maximize exhaust efficiency while delivering the deep, aggressive sound that Flowmaster is known for both inside and outside the vehicle. Utilizing factory mounting locations, this complete cat-back system installs with the included hardware and requires no cutting or welding, making it an excellent upgrade for both daily-driven and performance-oriented Mustangs.

Key Features

• Direct-fit Flowmaster Outlaw Cat-Back Exhaust System.
• Fits 2005-2010 Ford Mustang GT 4.6L V8 and GT500 5.4L V8.
• Race-proven Outlaw Series chambered mufflers.
• 2.50-inch mandrel-bent 409 stainless steel tubing for improved exhaust flow.
• Large 3.00-inch muffler outlets for maximum performance.
• Dual rear exit with 4.00-inch polished 304 stainless steel exhaust tips.
• Embossed Flowmaster logo on each exhaust tip.
• Bolt-on installation utilizing factory hanger locations.
• Includes clamps, hardware, and installation instructions.
• Compatible with both coupe and convertible models.
• Emissions-legal cat-back exhaust system.

Benefits

• Produces an aggressive, deep muscle car exhaust note that enhances the driving experience.
• Improves exhaust flow for enhanced engine performance and throttle response.
• Mandrel-bent stainless steel construction provides long-lasting durability and corrosion resistance.
• Large polished stainless steel tips deliver a premium performance appearance.
• Direct bolt-on design eliminates the need for cutting or welding under normal installation.
• Maintains factory-style fitment using original hanger locations.
• Includes Flowmaster's Lifetime Limited Warranty for long-term ownership confidence.
• Ideal for street-driven performance vehicles and weekend performance builds.

Product Specifications

• Part Number: 817515
• Brand: Flowmaster
• Product Type: Cat-Back Exhaust System
• Exhaust Series: Outlaw
• Sound Level: Aggressive
• Main Pipe Diameter: 2.50 inches
• Muffler Series: Outlaw
• Muffler Type: Chambered
• Muffler Body Material: 409 Stainless Steel
• Muffler Finish: Black High-Temperature Paint
• Muffler Body Dimensions: 10.50 in. L x 4.00 in. W x 4.00 in. H
• Muffler Outlet Diameter: 3.00 inches
• Pipe Material: 409 Stainless Steel
• Pipe Finish: Natural
• 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 Style: Round, Rolled Edge, Angled Cut, Single Wall
• Tip Logo: Embossed Flowmaster Logo
• Exit Style: Dual Rear Exit
• Clamping Style: Flat Band Clamps
• Clamps Included: Yes
• Hangers Included: Yes
• Mounting Style: Uses Factory Hangers
• Catalytic Converter Included: No
• California Proposition 65: Yes
• UPC: 700042032525

Install Difficulty Level

This exhaust system is designed as a straightforward bolt-on upgrade that installs using the factory mounting locations and included hardware. No cutting or welding is normally required, making installation approachable for most DIY enthusiasts with basic hand tools. The shortest published installation time is approximately 2 hours, making it an excellent weekend performance upgrade.

Vehicle Fitment

• 2005-2010 Ford Mustang GT – 4.6L V8
• 2005-2010 Ford Mustang GT500 – 5.4L Supercharged V8
• Fits both Coupe (Hardtop) and Convertible models.

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 professional product assistance.