21-26 Ford F-150 2.7L/3.5L/5.0L Flowmaster 718172 Flow FX Direct Fit Muffler

Flowmaster Flow FX Direct Fit Muffler 718172

Upgrade the exhaust performance and sound of the 2021-2026 Ford F-150 with the Flowmaster Flow FX Direct Fit Muffler system. Designed specifically for 2.7L, 3.5L, and 5.0L non-PowerBoost engines equipped with factory dual tailpipes, this direct-fit exhaust upgrade replaces the factory muffler and over-axle pipes while reusing the original tailpipes and exhaust tips. The Flow FX Series muffler delivers an aggressive to moderate exhaust tone with improved airflow characteristics, giving the truck a deeper, more powerful sound while maintaining a clean factory-style appearance. Constructed from durable 409 stainless steel with 3.00-inch mandrel-bent tubing, this system is engineered for long-lasting performance, increased exhaust flow, and an easy installation using factory hanger locations. Flowmaster testing has shown gains of up to 18 horsepower and 14 ft.-lbs. of torque at the rear wheels. 

Key Features

• Designed for 2021-2026 Ford F-150 trucks with 2.7L, 3.5L, and 5.0L non-PowerBoost engines with factory dual tailpipes.
• Flowmaster Flow FX Series muffler provides an aggressive to moderate exhaust sound with a deep performance tone.
• 3.00-inch mandrel-bent exhaust tubing promotes improved exhaust gas flow and performance.
• Manufactured from durable 409 stainless steel for excellent corrosion resistance and long service life.
• Direct-fit design replaces the factory muffler and over-axle pipes while reusing factory dual tailpipes and tips.
• Uses factory hanger locations for a simplified installation process.
• Dyno-tested performance improvements of up to 18 horsepower and 14 ft.-lbs. of torque at the rear wheels.
• Includes required installation hardware and instructions.

Benefits

• Enhances the truck’s exhaust note with a muscular Flowmaster performance sound.
• Improves exhaust flow for drivers seeking additional performance from their Ford F-150.
• Maintains a factory-style fit and appearance without requiring a complete exhaust replacement.
• Provides durable performance for daily driving, towing, and truck enthusiasts looking for an upgraded exhaust system.
• Offers a straightforward bolt-on upgrade that can be completed with common hand tools and basic mechanical skills.
• Backed by Flowmaster’s One (1) Year Limited Warranty for added product confidence.

Product Specifications

• Brand: Flowmaster
• Part Number: 718172
• Product Type: Direct-fit exhaust muffler assembly
• Exhaust Series: Flow FX
• Muffler Material: 409 Stainless Steel
• Pipe Material: 409 Stainless Steel
• Muffler Color: Silver
• Muffler Finish: Natural
• Muffler Shape: Oval
• Muffler Type: Absorption
• Main Tubing Diameter: 3.00 inches
• Body Height: 4.00 inches
• Body Width: 9.00 inches
• Muffler Body Length: 14.00 inches
• Overall Length: 52.50 inches
• Inlet Diameter: 3.00 inches
• Outlet Diameter: 3.00 inches
• Outlet Configuration: Dual
• Inlet Location: Center
• Outlet Location: Dual
• Mount Type: Factory hanger locations
• Clamps Included: Yes
• Hangers Included: Yes
• Exhaust Tip Style: Not Included; reuses factory tips
• Sound Level: Aggressive / Moderate
• Emission Code: 5
• California Proposition 65 Warning: Contains chemicals including chromium (hexavalent compounds) and nickel (metallic)

Install Difficulty Level

Easy installation with basic mechanical skills. The Flowmaster 718172 direct-fit muffler is designed as a bolt-on replacement using factory hanger locations, included hardware, and existing dual tailpipes. Installation can typically be completed in approximately 2 hours, making it a manageable upgrade for experienced DIY enthusiasts or professional installers.

Vehicle Fitment

• 2021-2026 Ford F-150 with 2.7L EcoBoost engine, non-PowerBoost, equipped with factory dual tailpipes.
• 2021-2026 Ford F-150 with 3.5L EcoBoost engine, non-PowerBoost, equipped with factory dual tailpipes.
• 2021-2026 Ford F-150 with 5.0L engine, non-PowerBoost, equipped with factory dual tailpipes.
• Does not fit Ford F-150 PowerBoost hybrid models.
• Does not fit Ford F-150 models equipped with the OEM active exhaust option.

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