Flowmaster

Flowmaster 817859 American Thunder Axle-back Exhaust System - Active Valves

Compatible with 2018-2020 Mustang GT 5.0L without Factory Active Performance Exhaust Valves.

Part # 817859 Be the first to write a review
Estimated Ship Date: 09/19/2022
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5

Emissions

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

See Emissions Details
Introducing our new American Thunder® Axle-back exhaust system featuring our new W.A.V.E. Technology™ (Wireless Active Valve Exhaust™) for all 2018-2020 Ford Mustang GT 5.0L coupes and convertibles, originally equipped WITHOUT the Factory Active Performance Exhaust Option. This trick new stainless steel exhaust system has two wireless remotes that control the high-quality actuators and exhaust valves included with the specially designed mufflers incorporating Outlaw® muffler technology. When the valves are closed, you have a moderate exterior and interior tone. Want more sound? Push the remote and the valves open for an aggressive wide-open sound...it's that simple! Other features include large 3.00 in. mandrel-bent 409S stainless steel tubing for high flow and durability. The system is finished off with quad 4.00 in. polished 304 stainless steel tips for an aggressive look that demands attention. Includes all necessary parts, hardware and detailed instructions for an easy installation you can do at home. Covered by the Flowmaster® Lifetime Limited Warranty. Want even more sound? Be sure to check out our Scavenger Series® X-pipe Resonator Delete kit #817817. Notes Fits coupes and convertible models.

Features:

  • Includes Two Wireless Controllers to Open/Close Valves
  • Comes with High Quality Valves and Actuator Motors
  • Mandrel-bent 16 Gauge Stainless Steel Tubing
  • Quad 4.00-inch Polished Stainless Steel Tips
  • Featuring Race-proven Outlaw Technology
  • Uses the Factory Hanger Locations
  • Deep Powerful Exterior Sound
  • Lifetime Limited Warranty
  • Open Exhaust Sound
  • W.A.V.E. Technology
  • Easy Installation
Brand Flowmaster
Emission Code5
Product TypeAxle-Back Exhaust
UPC700042039630
Manufacturer Part Number817859
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number817859
5

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.
Fits 2018-2020 Mustang GT 5.0L Coupes & Convertibles without Factory Active Performance Exhaust Valves.
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