817807 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. Features: Quad 4.00-inch Polished 304 Stainless Steel Tips Dyno-Tuned for Maximum Performance Uses the Factory Hanger Locations 409S Stainless Steel Construction Moderate/Aggressive Sound Lifetime Limited Warranty Flowmaster Quality Easy Installation About Flowmaster Flowmaster® is a household name, and for good reason. They've built legendary exhaust systems and mufflers for decades, and now offer performance air intakes, catalytic converters, and headers to give your hot rod performance to match the iconic Flowmaster sound. SPECS Brand Flowmaster Catalytic Converter Included No Emission Code 5 Exhaust Series American Thunder Exit Position Dual Out Rear Heat Shield No Material 409 Stainless Steel Mount Type Uses Factory Hangers Muffler Body Length (in) 13 Muffler Color Black Muffler Finish Painted Muffler Inlet Diameter (in) 2.5 Muffler Inlet Location Offset Muffler Material 409S Stainless Steel Muffler Outlet Diameter (in) 3 Muffler Outlet Location Dual Outlet Muffler Overall Length (in) 51.5 Muffler Part Number Kit Only Muffler Quantity 2 Muffler Series Super 44 Muffler Shape Oval Muffler Type Reflection Product Type Exhaust System Single Dual Dual Sound Level Aggressive / Moderate System Type Axle-back Tip Cut Angle Tip Diameter (in) 4 Tip Edge Style Cut Tip Finish Polished Tip Length (in) 5.25 Tip Logo Embossed Tip Material 304 Stainless Tip Quantity 4 Tip Shape Round Tubing Diameter (in) 3 Tubing Material 409S Stainless Steel UPC 700042037629 California Proposition 65 Chemical Name Chromium (hexavalent compounds) Nickel (Metallic) California Proposition 65 Required Yes Part Number 817807