Flowmaster 817799 Axle-Back Exhaust Kit Fits 2018 Mustang GT American Thunder

SKU: 817799
Fits 2018 and 2019 Mustang GT Fastback with 5.0L V8 Engine. Fits Vehicles With Active Performance Exhaust Option
Price: $1,199.95
FREE 3-Day Shipping (Details)

Shipping is free via UPS Ground or 3-Day Select for orders of $25 or more (excludes transmissions). If the transit time using UPS Ground Shipping will exceed 3 days to your location, we will upgrade the shipping service to UPS 3-Day Select, at no cost to you.

Free shipping is available within the continental U.S. only. Shipping charges will apply to all other destinations.

Verify This Part Fits Your Vehicle

Note 1: Fits vehicles equipped with Active Performance Exhaust option


Flowmaster's American Thunder Axle-back exhaust system for the 2018 and 2019 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 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.

  • Stailess Steel Construction
  • Works With Active Performance Exhaust Option
  • Aggressive Race Proven Outlaw Mufflers
  • Dyno Tuned for Maximum Performance
Exhaust SeriesAmerican ThunderMuffler Series60 Series
Sound LevelModerate/AggressiveMount TypeUses factory hangers
Tubing Diameter (in)3Muffler TypeReflection
Muffler ShapeOvalMuffler FinishPainted
Muffler Quantity2Muffler Outlet Diameter (in)3
Muffler Outlet LocationDualTip ShapeRound
Tip FinishPolishedTip CutAngle
Tip Diameter (in)4Tip Quantity4
Catalytic Converter IncludedNoSystem TypeAxle-back
Single DualDualMuffler Overall Length (in)49.5
Exit PositionDORTubing Material409S Stainless Steel
Muffler Part NumberKit OnlyMuffler Body Length (in)11
Muffler Material409S Stainless SteelMuffler ColorBlack
Muffler Inlet Diameter (in)3Muffler Inlet LocationSide
Tip StyleDouble wallTip Material304 Stainless
Tip LogoEmbossedTip Edge StyleCut
Tip Length (in)5.25Heat ShieldNo
 California Proposition 65 Information

WARNING: This product can expose you to chemicals including nickel (metallic) and chromium (hexavalent compounds) which are known to the State of California to cause cancer and birth defects, or other reproductive harm (For more information go to www.p65warnings.ca.gov)


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Search by Vehicle