18-23 Ford Mustang 5.0L V8 Flowmaster 817808 Outlaw Cat-back Exhaust System

Flowmaster Outlaw Cat-Back Exhaust System for 2018-2023 Ford Mustang GT 5.0L V8 (Non-Active Exhaust) - Part #817808

Part Number: 817808

The Flowmaster Outlaw Cat-Back Exhaust System is engineered for 2018-2023 Ford Mustang GT 5.0L V8 Coupes and Convertibles equipped without the factory Active Performance Exhaust system. Designed for enthusiasts seeking an unmistakably aggressive exhaust note, this premium cat-back system delivers a deep, race-inspired tone while improving exhaust flow for enhanced throttle response and performance. Featuring mandrel-bent 3.00-inch stainless steel tubing, Flowmaster's exclusive Scavenger Series X-Pipe, race-proven Outlaw Series mufflers, and striking quad 4.00-inch carbon fiber exhaust tips, this system combines premium styling with proven performance. The bolt-on design utilizes factory mounting locations for a straightforward installation without cutting or welding, making it an outstanding upgrade for drivers looking to maximize both sound and appearance.

Key Features

• Designed for 2018-2023 Ford Mustang GT 5.0L V8 Coupes and Convertibles.
• Fits vehicles without the factory Active Performance Exhaust valves.
• Dual 3.00-inch mandrel-bent 409 stainless steel tubing for maximum exhaust flow.
• Exclusive Flowmaster Scavenger Series X-Pipe improves exhaust scavenging and performance.
• Race-proven Outlaw Series reflection mufflers deliver an extremely aggressive exhaust tone.
• Quad 4.00-inch black carbon fiber exhaust tips with rolled edges and angled cut.
• Full stainless steel construction for long-lasting durability.
• Bolt-on installation using factory hanger locations.
• Includes clamps, hardware, and installation instructions.
• Engineered and dyno-tested for maximum performance and sound quality.

Benefits

• Produces an aggressive muscle car exhaust sound during acceleration and cruising.
• Improves throttle response by reducing exhaust restriction.
• Supports increased horsepower and torque through improved exhaust efficiency.
• Enhances the rear appearance with premium carbon fiber exhaust tips.
• Direct-fit design minimizes installation time while maintaining an OE-quality fit.
• Constructed from corrosion-resistant stainless steel for dependable long-term performance.
• Backed by Flowmaster's Limited Lifetime Warranty for added confidence and long-term value.

Product Specifications

• Part Number: 817808
• Product Type: Cat-Back Exhaust System
• Exhaust Series: Outlaw
• Material: 409 Stainless Steel
• Main Pipe Diameter: 3.00 inches
• Pipe Finish: Natural Silver
• Sound Level: Aggressive
• Exit Style: Dual Rear Exit
• Mufflers: Dual Outlaw Series Reflection Mufflers
• Muffler Finish: Black High-Temperature Paint
• Muffler Body Material: 409 Stainless Steel
• Exhaust Tip Diameter: 4.00 inches
• Exhaust Tip Length: 5.25 inches
• Exhaust Tip Material: Carbon Fiber
• Exhaust Tip Finish: Carbon Fiber with Black Appearance
• Exhaust Tip Style: Quad Round, Rolled Edge, Angled Cut, Double Wall
• Tip Connection: Welded
• Clamps Included: Yes
• Hangers Included: Yes
• Mounting Style: Uses Factory Hangers
• Catalytic Converters Included: No
• Valve Equipped: No
• Emissions Legal: Yes
• California Proposition 65: Yes

Install Difficulty Level

Difficulty: Easy

This direct bolt-on exhaust system is designed to reuse the factory mounting locations and hangers, eliminating the need for cutting or welding under normal installation conditions. All required hardware and detailed instructions are included. Under ideal shop conditions, installation can be completed in approximately 2 hours, making it an excellent weekend upgrade for experienced DIY installers or professional technicians.

Vehicle Fitment

Fits:

• 2018 Ford Mustang GT 5.0L V8 Coupe (Without Factory Active Performance Exhaust)
• 2018 Ford Mustang GT 5.0L V8 Convertible (Without Factory Active Performance Exhaust)
• 2019 Ford Mustang GT 5.0L V8 Coupe (Without Factory Active Performance Exhaust)
• 2019 Ford Mustang GT 5.0L V8 Convertible (Without Factory Active Performance Exhaust)
• 2020 Ford Mustang GT 5.0L V8 Coupe (Without Factory Active Performance Exhaust)
• 2020 Ford Mustang GT 5.0L V8 Convertible (Without Factory Active Performance Exhaust)
• 2021 Ford Mustang GT 5.0L V8 Coupe (Without Factory Active Performance Exhaust)
• 2021 Ford Mustang GT 5.0L V8 Convertible (Without Factory Active Performance Exhaust)
• 2022 Ford Mustang GT 5.0L V8 Coupe (Without Factory Active Performance Exhaust)
• 2022 Ford Mustang GT 5.0L V8 Convertible (Without Factory Active Performance Exhaust)
• 2023 Ford Mustang GT 5.0L V8 Coupe (Without Factory Active Performance Exhaust)
• 2023 Ford Mustang GT 5.0L V8 Convertible (Without Factory Active Performance Exhaust)

Important: This exhaust system does not fit Mustangs equipped with the factory Active Performance Exhaust option. Vehicles equipped with Active Exhaust require Flowmaster part number 817800.

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