- Exhaust Systems
- Exhaust Kits - Catalytic Converter/Axle Back
- Flowmaster American Thunder Exhaust Systems for Cars
Experience An Exhaust System Tuned for Performance and Tone
If you need an exhaust system that has been dyno tuned to produce maximum performance, look no further than Flowmaster's American Thunder Exhaust Systems. This line, designed for passenger cars, produces a range of systems that offer moderate to aggressive exhaust notes. Available in axle, cat, and header-back configurations, Flowmaster has you covered. To ensure durability and ease of installation, these kits are made from 16-gauge mandrel bent tubing and includes the necessary hangers and hardware.
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Ford Fairlane
American Thunder Header-Back Exhaust System1966-1967 Ford Fairlane 2.5" Tubing 3" Polished SS Tips Dual Rear Exit Super 50 Series Muffler Aluminized Steel
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$875.95
Estimated to ship direct from manufacturer in 24hrs
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Ford Fiesta ST
Flowmaster 817784
Flowmaster American Thunder Cat-Back Exhaust System 2014-2017 Ford Fiesta ST 1.6L Turbo
American Thunder Cat-Back Exhaust System 2014-2017 Ford Fiesta ST 1.6L Turbo 2.5" Tubing 3" Round Polished Stainless Steel Tips Single Rear Exit Outlaw Series Muffler & Resonator 409S Stainless Steel
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$823.95
Estimated to ship direct from manufacturer in 24hrs
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Ford Mustang V6
Flowmaster 17421
Flowmaster American Thunder Axle-Back Exhaust System 2005-2009 Ford Mustang 4.0L V6
$419.95
(1)
Estimated to ship direct from manufacturer in 24hrs
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American Thunder Axle-Back Exhaust System2005-2009 Ford Mustang 4.0L V6 2.5" Tubing 3.5" Polished SS Tips Single Rear Exit 60 Series Delta Flow Muffler Aluminized Steel
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$419.95
(1)
Estimated to ship direct from manufacturer in 24hrs
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Flowmaster 817748
Flowmaster American Thunder Axle-Back Exhaust System 2015-2018 Mustang 2.3L EcoBoost or 3.7L V6
American Thunder Axle-Back Exhaust System 2015-2018 Mustang 2.3L EcoBoost or 3.7L V6 3" Tubing 4" Polished Stainless Steel Double Wall Tips Dual Out Rear Exit Super 10 Series Mufflers 409S Stainless Steel
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$725.95
Estimated to ship direct from manufacturer in 24hrs
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Ford Mustang V8
Flowmaster 818162
Flowmaster 818162 American Thunder Axle-Back Exhaust System Fits Select Ford Mustang GT 5.0L/EcoBoost 2.3L [Dual Exit]
American Thunder Axle-Back Exhaust SystemFits Select Ford Mustang GT 5.0L/EcoBoost 2.3L 3 in. Tubing 4 in. Polished Tips Dual Rear Exit 409 Stainless Steel 44 Series Muffler
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$988.95
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Flowmaster 817807
Flowmaster 817807 American Thunder Axle-Back Exhaust System 2018-2023 Ford Mustang GT 5.0L V8
American Thunder Axle-Back Exhaust System 2018-2023 Ford Mustang GT 5.0L V8 3" Tubing 4" Round Polished Stainless Steel Tips Dual Rear Exit Super 44 Series Mufflers 409S Stainless Steel
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$999.95
Estimated to ship direct from manufacturer in 24hrs
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American Thunder Axle-Back Exhaust System 2018-2019 Mustang GT 5.0L V8 3" Tubing 4" Round Polished Stainless Steel Tips Dual Rear Exit 60 Series Mufflers 409S Stainless Steel
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$1,630.95
Estimated to ship direct from manufacturer in 24hrs
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Flowmaster 817460
Flowmaster American Thunder Axle-Back Exhaust System 2005-2010 Ford Mustang GT/GT500 4.6L/5.4L
American Thunder Axle-Back Exhaust System2005-2010 Ford Mustang GT/GT500 4.6L/5.4L 2.5" Tubing 4" Polished SS Tips Dual Rear Exit Super 44 Series Muffler 409S Stainless Steel
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$553.95
(1)
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Flowmaster 817588
Flowmaster American Thunder Axle-Back Exhaust System 2013-2014 Ford Mustang GT 5.0L V8
American Thunder Axle-Back Exhaust System2013-2014 Ford Mustang GT 5.0L V8 3" Tubing 4" Polished SS Tips Dual Rear Exit Super 44 Series Muffler 409S Stainless Steel
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$656.95
Estimated to ship direct from manufacturer in 24hrs
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American Thunder Axle-Back Exhaust System 2015-2017 Mustang GT 5.0L V8 3" Stainless Steel Tubing 4" Polished Stainless Steel Double Wall Tips Dual Out Rear Exit Super 44 Series Mufflers 409S Stainless Steel
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$827.95
Estimated to ship direct from manufacturer in 24hrs
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American Thunder Cat-Back Exhaust System1986-1993 Ford Mustang LX 5.0L 1986 Mustang GT 5.0L 2.5" Tubing OE Aluminized Tips Dual Rear Exit Super 44 Series Muffler Aluminized Steel
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$626.95
Estimated to ship direct from manufacturer in 24hrs
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American Thunder Cat-Back Exhaust System1986-1993 Ford Mustang LX 5.0L 1986 Mustang GT 5.0L 2.5" Tubing 2.5" Polished SS Tips Dual Rear Exit Super 44 Series Muffler Aluminized Steel
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$635.95
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Flowmaster 817213
Flowmaster American Thunder Cat-Back Exhaust System 1986-1993 Ford Mustang LX 5.0L
American Thunder Cat-Back Exhaust System1986-1993 Ford Mustang LX 5.0L 1986 Mustang GT 5.0L 2.5" Tubing 2.5" Polished SS Tips Dual Rear Exit Super 44 Series Muffler 409S Stainless Steel
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$744.95
(1)
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Flowmaster 817574
Flowmaster American Thunder Cat-Back Exhaust System 1986-2004 Ford Mustang GT/LX/Cobra 4.6L/5.0L V8
American Thunder Cat-Back Exhaust System1986-2004 Ford Mustang GT/LX/Cobra 4.6L/5.0L V8 2.5" Tubing Tips Not Included Dual Dump Exit Super 44 Series Muffler 409S Stainless Steel
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$499.95
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American Thunder Cat-Back Exhaust System1987-1993 Ford Mustang GT 5.0L 2.5" Tubing Tips Not Included Dual Rear Exit Super 44 Series Muffler Aluminized Steel
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$630.95
Estimated to ship direct from manufacturer in 24hrs
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Flowmaster 817116
Flowmaster American Thunder Cat-Back Exhaust System 1987-1993 Ford Mustang GT 5.0L
$795.95
(1)
Estimated to ship direct from manufacturer in 24hrs
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American Thunder Cat-Back Exhaust System1987-1993 Ford Mustang GT 5.0L 2.5" Tubing Tips Not Included Dual Rear Exit Super 44 Series Muffler 409S Stainless Steel
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$795.95
(1)
Estimated to ship direct from manufacturer in 24hrs
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Flowmaster 17112
Flowmaster American Thunder Cat-Back Exhaust System 1994-1997 Ford Mustang GT/Cobra 4.6L/5.0L
American Thunder Cat-Back Exhaust System1994-1997 Ford Mustang GT/Cobra 4.6L/5.0L 2.5" Tubing Tips Not Included Dual Rear Exit Super 44 Series Muffler Aluminized Steel
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$579.95
Estimated to ship direct from manufacturer in 24hrs
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Flowmaster 17212
Flowmaster American Thunder Cat-Back Exhaust System 1994-1997 Ford Mustang GT/Cobra 4.6L/5.0L
American Thunder Cat-Back Exhaust System1994-1997 Ford Mustang GT/Cobra 4.6L/5.0L 2.5" Tubing 2.5" Polished SS Tips Dual Rear Exit Super 44 Series Muffler Aluminized Steel
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$657.95
Estimated to ship direct from manufacturer in 24hrs
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Flowmaster 17215
Flowmaster American Thunder Cat-Back Exhaust System 1998 Ford Mustang GT/Cobra 4.6L V8
American Thunder Cat-Back Exhaust System1998 Ford Mustang GT/Cobra 4.6L V8 2.5" Tubing 2.5" Polished SS Tips Dual Rear Exit Super 44 Series Muffler Aluminized Steel
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$723.95
(2)
Estimated to ship direct from manufacturer on 02/06/25, pending manufacturer availability.
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Flowmaster 17248
Flowmaster American Thunder Cat-Back Exhaust System 1999-2004 Ford Mustang Cobra 4.6L V8
American Thunder Cat-Back Exhaust System1999-2004 Ford Mustang Cobra 4.6L V8 2.5" Tubing 3" Polished SS Tips Dual Rear Exit Super 40 Series Muffler Aluminized Steel
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$825.95
Estimated to ship direct from manufacturer in 24hrs
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Flowmaster American Thunder Cat-Back Exhaust System 1999-2004 Ford Mustang GT/Mach 1/Bullitt 4.6L V8
Flowmaster 17312
Flowmaster American Thunder Cat-Back Exhaust System 1999-2004 Ford Mustang GT/Mach 1/Bullitt 4.6L V8
American Thunder Cat-Back Exhaust System1999-2004 Ford Mustang GT/Mach 1/Bullitt 4.6L V8 2.5" Tubing 3" Polished SS Tips Dual Rear Exit Super 40 Series Muffler Aluminized Steel
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$646.95
Estimated to ship direct from manufacturer in 24hrs
Lowest Price Guarantee
Flowmaster American Thunder Cat-Back Exhaust System 1999-2004 Ford Mustang GT/Mach 1/Bullitt 4.6L V8
Flowmaster 817312
Flowmaster American Thunder Cat-Back Exhaust System 1999-2004 Ford Mustang GT/Mach 1/Bullitt 4.6L V8
American Thunder Cat-Back Exhaust System1999-2004 Ford Mustang GT/Mach 1/Bullitt 4.6L V8 2.5" Tubing 3" Polished SS Tips Dual Rear Exit Super 40 Series Muffler 409S Stainless Steel
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$910.95
Estimated to ship direct from manufacturer in 24hrs
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Flowmaster 817494
Flowmaster American Thunder Cat-Back Exhaust System 2005-2010 Ford Mustang GT/GT500 4.6L/5.4L V8
American Thunder Cat-Back Exhaust System2005-2010 Ford Mustang GT/GT500 4.6L/5.4L V8 3" Tubing 4" Polished SS Tips Dual Rear Exit 60 Series Delta Flow Muffler 409S Stainless Steel
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$1,241.95
Estimated to ship direct from manufacturer in 24hrs
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Flowmaster 817730
Flowmaster American Thunder Cat-Back Exhaust System 2015-2017 Ford Mustang GT 5.0L V8
American Thunder Cat-Back Exhaust System2015-2017 Ford Mustang GT 5.0L V8 3" Tubing 4" Polished SS Tips Dual Rear Exit 60 Series Delta Flow Muffler 409S Stainless Steel
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$1,320.95
Estimated to ship direct from manufacturer in 24hrs
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American Thunder Header-Back Exhaust System1964-1966 Ford Mustang V8 Except Convertibles 2.5" Tubing 2.5" Polished SS Tips Dual Rear Exit 40 Series Delta Flow Muffler Aluminized Steel
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$879.95
Estimated to ship direct from manufacturer on 02/27/25, pending manufacturer availability.
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American Thunder Header-Back Exhaust System1964-1966 Ford Mustang V8 2.5" Tubing 2.5" Polished SS Tips Dual Rear Exit Super 44 Series Muffler 409S Stainless Steel
Will not fit GT or Convertible models
Will not fit GT or Convertible models
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$999.95
Estimated to ship direct from manufacturer in 24hrs
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American Thunder Header-Back Exhaust System1967-1970 Ford Mustang V8 2.5" Tubing 3" Polished SS Tips Dual Rear Exit Super 44 Series Muffler Aluminized Steel
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$761.95
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American Thunder Header-Back Exhaust System1967-1970 Ford Mustang V8 2.5" Tubing 2.5" Turndown Tips Dual Rear Exit Super 44 Series Muffler Aluminized Steel
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$713.95
(1)
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$868.95
(1)
Estimated to ship direct from manufacturer in 24hrs
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American Thunder Header-Back Exhaust System1967-1970 Ford Mustang V8 2.5" Tubing 3" Polished SS Tips Dual Rear Exit Super 44 Series Muffler 409S Stainless Steel
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$868.95
(1)
Estimated to ship direct from manufacturer in 24hrs
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American Thunder Header-Back Exhaust System1967-1970 Ford Mustang V8 2.5" Tubing 2.5" Turndown Tips Dual Rear Exit Super 44 Series Muffler 409S Stainless Steel
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$914.95
Estimated to ship direct from manufacturer in 24hrs
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