15-20 Ford F-150 2.7L/3.5L EB / 5.0L Flowmaster 817725 American Thunder Cat-back Exhaust System

Flowmaster American Thunder Cat-back Exhaust System - Part Number 817725

Flowmaster American Thunder Cat-back Exhaust System 817725 is designed for 2015-2020 Ford F-150 owners who want a powerful, aggressive exhaust tone with the performance reputation of Flowmaster. This bolt-on exhaust upgrade delivers a deep, muscular sound outside the truck while maintaining a moderate interior sound level for comfortable daily driving. Engineered with premium 409S stainless steel construction, mandrel-bent tubing, and Flowmaster's Super 40 Series muffler with Delta Flow Technology, this system improves exhaust flow while adding a custom performance appearance. The dual exhaust design includes both rear exit and side exit tailpipes, allowing drivers to choose the style that best matches their truck setup and towing needs.

Key Features

• Flowmaster American Thunder Series cat-back exhaust system designed for performance truck applications
• Super 40 Series chambered performance muffler delivers a deep, aggressive exhaust tone
• Patented Delta Flow Technology helps optimize exhaust flow and sound control
• 3.00-inch mandrel-bent inlet tubing for improved exhaust efficiency
• Dual 2.50-inch mandrel-bent tailpipes provide a balanced exhaust flow design
• Includes both rear exit and side exit tailpipe options for customized appearance and towing versatility
• Polished 3.50-inch stainless steel exhaust tips provide a premium finished look
• Uses factory hanger locations for a clean, secure installation
• Designed to clear the factory spare tire location
• Complete kit includes necessary hardware for installation

Benefits

• Provides a bold Flowmaster exhaust sound while maintaining comfortable interior acoustics
• Enhances the appearance of the Ford F-150 with polished stainless steel exhaust tips
• Offers durable corrosion-resistant construction for long-lasting performance
• Improves exhaust flow characteristics compared to the factory exhaust system
• Provides a direct-fit bolt-on upgrade with no major modifications required
• Ideal for street driving, towing applications, and truck enthusiasts seeking a performance exhaust upgrade
• Backed by Flowmaster's Lifetime Limited Warranty for added confidence and long-term value

Product Specifications

• Brand: Flowmaster
• Part Number: 817725
• Product Type: Cat-back Exhaust System
• Exhaust Series: American Thunder
• Material: 409 Stainless Steel
• Exhaust Finish: Natural stainless finish
• Muffler Type: Super 40 Series Chambered Muffler
• Muffler Material: 409 Stainless Steel with black high-temperature paint finish
• Muffler Size: 10.00-inch width x 5.00-inch height x 10.25-inch length
• Inlet Diameter: 3.00 inches
• Main Piping Diameter: 2.50 inches
• Tail Pipe Diameter: 2.50 inches
• Exhaust Tip Diameter: 3.50 inches
• Exhaust Tip Material: 304 Stainless Steel
• Exhaust Tip Finish: Polished
• Exhaust Tip Style: Round, angled cut, double-wall design
• Exhaust Tip Quantity: Two
• Sound Level: Aggressive exterior sound with moderate interior sound
• Catalytic Converter Included: No
• Clamps Included: Yes
• Hangers Included: Yes
• Mounting Brackets Included: Yes
• Emission Code: 5
• California Proposition 65 Warning Applies

Install Difficulty Level

This Flowmaster American Thunder Cat-back Exhaust System is designed for an easy bolt-on installation using basic hand tools and factory mounting locations. The installation can typically be completed in approximately 2 hours, making it a manageable upgrade for experienced DIY enthusiasts or a quick professional installation. Minor adjustments may be required depending on vehicle configuration.

Vehicle Fitment

• 2015-2020 Ford F-150 with 2.7L EcoBoost engine
• 2018-2020 Ford F-150 with 3.3L engine
• 2015-2020 Ford F-150 with 3.5L EcoBoost engine
• 2015-2020 Ford F-150 with 3.5L Ti-VCT engine
• 2015-2017 Ford F-150 with 5.0L engine
• Fits 2WD and 4WD configurations
• Fits multiple cab and bed configurations except Standard Cab/Short Bed models
• Does not fit Ford F-150 Raptor models

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