04-08 Ford F-150 4.6L/5.4L Flowmaster 817417 American Thunder Cat-back Exhaust System

Flowmaster 817417 American Thunder Cat-Back Exhaust System

The Flowmaster American Thunder Cat-Back Exhaust System is engineered for 2004-2008 Ford F-150 and Lincoln Mark LT trucks equipped with the 4.6L or 5.4L engines. Designed for drivers who want a bold exhaust presence without sacrificing everyday drivability, this performance exhaust system delivers an aggressive exterior sound with a moderate interior tone. The system features Flowmaster's specially designed Super 40 Series chambered muffler, dyno-tuned performance characteristics, and a dual-exit design that enhances the truck’s appearance while supporting improved exhaust flow. With factory-style hanger locations, included hardware, and a bolt-on installation design, this American Thunder system provides a practical upgrade for truck owners seeking classic Flowmaster sound, durable construction, and a premium performance exhaust solution.

Key Features

• Flowmaster American Thunder Series cat-back exhaust system designed for performance truck applications.
• Super 40 Series chambered performance muffler provides a deep, aggressive exhaust tone.
• Moderately aggressive exterior sound with a controlled interior tone for daily driving comfort.
• Dyno-tuned design helps maximize exhaust performance and flow characteristics.
• Dual-out rear or dual-out side exit configuration allows customized exhaust appearance.
• Dual 2.50-inch tailpipes provide a muscular performance look.
• Large 3.00-inch polished stainless steel exhaust tips add a premium finishing touch.
• Uses factory hanger locations for a straightforward bolt-on installation.
• Includes necessary clamps, hangers, mounting brackets, and installation hardware.

Benefits

• Provides a noticeable Flowmaster performance sound upgrade compared to the factory exhaust system.
• Enhances the truck’s exterior styling with polished stainless steel exhaust tips and dual exits.
• Offers durable exhaust performance with stainless steel components designed for long-term use.
• Maintains a comfortable driving experience with a moderate interior sound level.
• Ideal for truck enthusiasts looking for improved exhaust character, appearance, and performance.
• Covered by Flowmaster’s Lifetime Limited Warranty for added product confidence.

Product Specifications

• Brand: Flowmaster
• Series: American Thunder
• Part Number: 817417
• Product Type: Cat-Back Exhaust System
• Exhaust Sound Level: Aggressive / Moderate
• Muffler Series: Super 40 Series
• Muffler Type: Chambered
• Muffler Material: 409 Stainless Steel
• Muffler Finish: Black high-temperature paint finish
• Pipe Material: 409 Stainless Steel
• Main Piping Diameter: 2.50 inches
• Tail Pipe Diameter: 2.50 inches
• Exhaust Tip Diameter: 3.00 inches
• Exhaust Tip Material: 304 Stainless Steel
• Exhaust Tip Finish: Polished stainless steel
• Exhaust Tip Color: Silver
• Exhaust Tip Quantity: 2
• Exit Style: Dual Out Rear / Dual Out Side
• Tip Shape: Round
• Tip Style: Angled cut with rolled edge
• Clamps Included: Yes
• Hangers Included: Yes
• Catalytic Converter Included: No
• Drive Compatibility: 2WD and 4WD models
• Wheelbase Compatibility: All wheelbases
• California Proposition 65: Yes

Install Difficulty level

This exhaust system is designed for an easy bolt-on installation using factory hanger locations and included mounting hardware. With basic hand tools and proper vehicle support, installation can typically be completed in approximately 2 hours, making it a manageable upgrade for experienced do-it-yourself installers.

Vehicle Fitment

• 2004-2008 Ford F-150 with 4.6L V8 engine
• 2004-2008 Ford F-150 with 5.4L V8 engine
• 2004-2008 Lincoln Mark LT with 4.6L V8 engine
• 2004-2008 Lincoln Mark LT with 5.4L V8 engine
• Fits 2-wheel drive and 4-wheel drive 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.