The Flowmaster American Thunder® Axle-back exhaust system for the 2018-2023 Ford Mustang GT with the 5.0L engine is perfect for the person looking for an aggressive exterior sound level with all of the performance benefits that you would expect from Flowmaster®. This bolt-on 409S stainless steel system features 3.00-inch mandrel-bent tubing and two Super 44® series mufflers for maximum power and exterior sound quality, but with a moderate and pleasant interior tone at cruising speeds. The system is finished off with quad 4.00-inch polished 304 stainless steel tips. This system includes all necessary parts, hardware and instructions for an easy installation. NOTE: This kit will not fit vehicles with the Active Performance Exhaust option. Note: Fits Coupes & Convertibles.. Fits 2018-2023 Mustang GT 5.0L without Factory Active Performance Exhaust Valves. - Aggressive to moderate sound. Fits 2018-2023 Mustang GT 5.0L Coupes & Convertibles without Factory Active Performance Exhaust Valves.. Flowmaster 18-23 Mustang 5.0L American Thunder Axle-Back Exhaust System (No Valves). Flowmaster American Thunder Axle-back Exhaust System. Quad 4.00-inch Polished 304 Stainless Steel Tips. Dyno-Tuned for Maximum Performance. 1823 MUSTANG 50L AB AMT NO VALVES. Uses the Factory Hanger Locations. 409S Stainless Steel Construction. Moderate/Aggressive Sound. Lifetime Limited Warranty. SYS 18-23 MUSTANG 5.. Flowmaster Quality. Easy Installation. SYS 18-23 MU

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