15-20 Ford F-150 2.7L/3.5L Flowmaster 4in. Outlaw SS Cat-Back Exhaust System

Flowmaster Outlaw SS 4-Inch Cat-Back Exhaust System for 2015-2020 Ford F-150 2.7L/3.3L/3.5L EcoBoost - Part #817756

The Flowmaster Outlaw SS Cat-Back Exhaust System is engineered for 2015-2020 Ford F-150 trucks equipped with the 2.7L, 3.3L, or 3.5L EcoBoost engine. Designed for truck owners seeking maximum performance with an unmistakably aggressive exhaust note, this premium bolt-on system delivers race-inspired sound both inside and outside the vehicle while maintaining emissions compliance. Featuring a race-proven Outlaw Series chambered muffler, large 4-inch mandrel-bent tubing, and a 5-inch black ceramic-coated stainless steel exhaust tip, this system improves exhaust flow for enhanced throttle response and performance. Manufactured from durable 409 stainless steel and designed to utilize the factory hanger locations, this direct-fit exhaust offers long-lasting durability, outstanding fitment, and an easy installation. Backed by Flowmaster's Lifetime Limited Warranty, this exhaust system is an excellent upgrade for drivers who want aggressive styling, proven performance, and legendary Flowmaster sound.

Key Features

• Direct-fit Outlaw SS Cat-Back exhaust system.
• Designed specifically for 2015-2020 Ford F-150 EcoBoost models.
• Race-proven Outlaw Series chambered muffler delivers an aggressive exhaust tone.
• Dyno tuned for maximum exhaust flow and performance.
• Large 4.00-inch mandrel-bent exhaust tubing improves exhaust efficiency.
• Constructed from durable 409 stainless steel for long service life.
• 5.00-inch black ceramic-coated 304 stainless steel exhaust tip with embossed Flowmaster logo.
• Uses factory hanger locations for precise bolt-on installation.
• Includes clamps, hangers, and required installation hardware.
• Compatible with both 2WD and 4WD applications.
• Emissions-legal cat-back design.

Benefits

• Produces an aggressive, performance-inspired exhaust sound inside and outside the truck.
• Improves exhaust flow for enhanced throttle response and overall engine performance.
• Provides a premium appearance with a large black ceramic-coated exhaust tip.
• Direct bolt-on design eliminates the need for fabrication or welding under normal installation.
• Built from corrosion-resistant stainless steel materials for long-term durability.
• Maintains factory-style fitment by utilizing original mounting locations.
• Ideal upgrade for enthusiasts seeking improved sound and performance without removing catalytic converters.
• Protected by Flowmaster's Lifetime Limited Warranty for long-term confidence.

Product Specifications

• Part Number: 817756
• Product Type: Cat-Back Exhaust System
• Exhaust Series: Outlaw
• Sound Level: Aggressive
• Muffler Type: Chambered Reflection
• Muffler Series: Outlaw
• Main Pipe Diameter: 4.00 inches
• Tailpipe Diameter: 4.00 inches
• Exit Style: Single Side Exit
• Tailpipe Quantity: Single
• Pipe Material: 409 Stainless Steel
• Muffler Material: 409 Stainless Steel
• Exhaust Tip Material: 304 Stainless Steel
• Exhaust Tip Diameter: 5.00 inches
• Exhaust Tip Length: 12.00 inches
• Exhaust Tip Finish: Black Ceramic Coated
• Exhaust Tip Color: Black
• Exhaust Tip Shape: Round
• Exhaust Tip Edge: Rolled Edge
• Tip Connection: Clamp-On
• Pipe Finish: Natural Silver
• Clamps Included: Yes
• Hangers Included: Yes
• Mounting Style: Factory Hanger Locations
• Catalytic Converter Included: No
• California Proposition 65: Yes
• UPC: 700042035137

Install Difficulty Level

This exhaust system is designed as a straightforward bolt-on upgrade that installs using the factory mounting locations and supplied hardware. No welding is typically required, making installation ideal for experienced DIY enthusiasts with basic hand tools. Under favorable shop conditions, installation can be completed in approximately 1 hour, allowing the truck to quickly benefit from improved performance and aggressive Flowmaster sound.

Vehicle Fitment

Fits the following vehicles:

• 2015-2020 Ford F-150 2.7L EcoBoost
• 2018-2020 Ford F-150 3.3L EcoBoost
• 2015-2020 Ford F-150 3.5L EcoBoost
• Fits both 2WD and 4WD models.
• Fits all wheelbases.
• Does not fit Standard Cab/Short Bed models.
• Does not fit Ford Raptor 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.