09-14 Ford F-150 4.6L/5.0L/5.4L Flowmaster 817522 American Thunder Cat-back Exhaust System

Flowmaster American Thunder Cat-Back Exhaust System - Part #817522

The Flowmaster American Thunder Cat-Back Exhaust System (Part #817522) is engineered for 2009-2014 Ford F-150 trucks equipped with the 4.6L, 5.0L, or 5.4L V8 engine. Designed to deliver the unmistakable Flowmaster performance exhaust tone, this premium bolt-on system produces an aggressive to moderate sound while improving exhaust flow for enhanced throttle response and overall driving enjoyment. Constructed from durable mandrel-bent stainless steel tubing and featuring the legendary Super 40 Series chambered muffler, this exhaust system offers long-lasting durability, proven performance, and an aggressive appearance with polished stainless steel exhaust tips. Compatible with both 2WD and 4WD models as well as all wheelbases, this complete cat-back kit includes all necessary clamps, hangers, and hardware for a straightforward at-home installation.

Key Features

• Flowmaster American Thunder Cat-Back Exhaust System.
• Part Number: 817522.
• Fits 2009-2014 Ford F-150 models with 4.6L, 5.0L, and 5.4L V8 engines.
• Compatible with 2WD and 4WD trucks and all wheelbases.
• Bolt-on design connects after the factory catalytic converter.
• Legendary Flowmaster Super 40 Series chambered muffler.
• Aggressive to moderate exterior exhaust tone with minimal interior compromise.
• Mandrel-bent 16-gauge 409 stainless steel tubing for maximum exhaust flow.
• Dual 2.50-inch mandrel-bent tailpipes.
• 3.00-inch inlet diameter.
• Large polished 304 stainless steel exhaust tips with rolled angle-cut edges.
• Choice of Dual Out Rear or Dual Out Side exit configuration.
• Includes clamps, hangers, mounting hardware, and installation components.
• Engineered for improved exhaust efficiency and long service life.

Benefits

• Produces the iconic deep Flowmaster performance exhaust note without excessive harshness.
• Improves exhaust flow to support better throttle response and overall engine performance.
• High-quality stainless steel construction helps resist corrosion for long-term durability.
• Mandrel-bent tubing maintains consistent pipe diameter for maximum airflow.
• Complete bolt-on design eliminates the need to source additional installation hardware.
• Designed to provide an excellent balance of performance, sound quality, and everyday drivability.
• Backed by Flowmaster's Lifetime Limited Warranty for long-term confidence.
  

Product Specifications

• Brand: Flowmaster
• Part Number: 817522
• Product Type: Cat-Back Exhaust System
• Exhaust Series: American Thunder
• Sound Level: Aggressive / Moderate
• Material: 409 Stainless Steel piping and muffler body
• Exhaust Tip Material: 304 Stainless Steel
• Pipe Finish: Natural
• Pipe Color: Silver
• Muffler Finish: Black High-Temperature Paint
• Muffler Series: Super 40 Series
• Muffler Type: Chambered
• Muffler Shape: Oval
• Muffler Dimensions: 10.50-inch length x 10.00-inch width x 5.00-inch height
• Main Pipe Diameter: 2.50 inches
• Inlet Diameter: 3.00 inches
• Tailpipe Outlet Diameter: 2.50 inches
• Exhaust Tip Diameter: 3.00 inches
• Exhaust Tip Length: 13.00 inches
• Exhaust Tip Finish: Polished
• Exhaust Tip Shape: Round
• Exhaust Tip Style: Rolled Edge Angle Cut
• Exhaust Tip Quantity: 2
• Exit Style: Dual Out Rear or Dual Out Side
• Clamps Included: Yes
• Hangers Included: Yes
• Mounting Brackets Included: Yes
• Catalytic Converter Included: No
• California Proposition 65: Yes

Install Difficulty Level

Easy to Moderate. This direct bolt-on exhaust system is designed to install using factory mounting locations and connects after the original catalytic converter. All required clamps, hangers, and installation hardware are included. With basic hand tools and a safe way to raise the vehicle, installation can be completed in as little as 2 hours, making it an excellent weekend upgrade for most DIY enthusiasts.

Vehicle Fitment

Ford F-150

• 2009-2010 – 4.6L V8
• 2009-2010 – 5.4L V8
• 2011-2014 – 5.0L V8
• Fits 2WD and 4WD models.
• Fits all wheelbase configurations.

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