Product Summary

Axle-Back Exhaust System Type, Dual Single or Dual

    Key Specs

    MFG. Part #817799
    Exhaust System TypeAxle-Back
    Single or DualDual
    Exhaust Tubing Diameter3 Inch

    Need To Know

    Quick and Easy Returns

    Return Policy

    Flowmaster 817799 Details

    Fits 2018-2021 Mustang GT 5.0L With Factory Active Performance Exhuast Valves 

    Flowmaster's American Thunder Axle-back exhaust system for the 18-19 Ford Mustang GT is perfect for the person looking for a moderate to aggressive sound level both inside and outside of the car, with all of the performance benefits that you would expect from Flowmaster. This bolt-on DOR (Dual Out Rear) emissions-legal system for cars with the 5.0L engine features a pair of Outlaw Series mufflers and dual mandrel bent 3.00 inch tailpipes for maximum performance. The mufflers include functional exhaust valves to work with the OE actuator motors to select between sound levels.The system is built out of 409S stainless steel and utilizes Quad 4.00 inch polished stainless steel tips with the Flowmaster logo embossed in them. This system fits vehicles equipped with Active Performance Exhaust Option. The exhaust system is manufactured in the USA and is covered by Flowmaster's Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation. Note: This system fits hardtops and convertibles.

    • Quad 4.00-inch Polished 304 Stainless Steel Tips
    • For Vehicles With Active Performance Exhaust Option
    • Aggressive Race-proven Outlaw Mufflers
    • Dyno Tuned for Maximum Performance
    • Uses the Factory Hanger Locations
    • Full Stainless Steel Construction
    • Straight-through Muffler Design
    • Lifetime Limited Warranty
    • Easy Installation


    Flowmaster 817799 Specifications

    MFG. Part #817799
    Exhaust System TypeAxle-Back
    Single or DualDual
    Exhaust Tubing Diameter3 Inch
    Exhaust ExitDual Split Rear
    Sound LevelModerate/Aggressive
    Muffler(s) IncludedYes
    Muffler Quantity2
    Muffler TypeReflection
    Exhaust Tip IncludedYes
    Exhaust Tip Quantity4
    Exhaust Tip ShapeRound
    Exhaust Tip CutAngle
    Exhaust Tip Edge StyleCut Edge | Double-Wall
    Exhaust Tip Size4.00"
    Exhaust Tip Length5.25"
    Exhaust System Material409 Stainless Steel
    Muffler Inlet Diameter3"
    Muffler Outlet Diameter3"
    Muffler Overall Length49.5"
    Muffler Body Length11"
    Muffler Material409 Stainless Steel
    Muffler FinishPainted
    Muffler ColorBlack
    Exhaust Tip Material304 Stainless Steel
    Exhaust Tip FinishPolished
    Mount TypeUses Factory Hangers
    Catalytic Converter(s) IncludedNo
    Sold in QuantityKit
    GTIN Code700042037766
    Exit LocationRear