American Thunder

Showing 1–24 of 170 results

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SKU
Product
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  • Flowmaster American Thunder Crossmember-Back Exhaust System
    SKU: 817104
    • All stainless steel 409S construction backed by Flowmaster’s Limited Lifetime Warranty
    • Exclusive 80 Series Crossflow muffler retains full ground clearance in the factory rear-axle location
    • Mandrel-bent dual 2.50-inch pipes with H-pipe crossover for a deep, smooth tone and reduced deceleration back-rap
    • Moderate sound level delivers a rich exhaust note without an overwhelming cabin drone
    • CARB compliant and includes all parts, hardware, and illustrated instructions for a complete install
    • Direct-fit for 1967-1974 Camaro and Firebird and 1968-1974 Nova in 2WD applications
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 817423
    • Deep, aggressive exterior sound with a moderate, livable interior tone from the Super 50 Series muffler
    • 16-gauge mandrel-bent stainless steel tubing with dual 2.50-inch tailpipes and 3.00-inch polished tips
    • Choose Dual Out Rear for towing or Dual Out Side for a muscular look
    • Bolt-on install using factory hanger locations with all hardware included
    • Emissions-legal, CARB (California) compliant, and backed by a Lifetime Limited Warranty
    • Direct fit for 2006-2008 Ram 1500 5.7L Hemi, 2WD/4WD, all wheelbases except MegaCab
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 817424
    • Deep, aggressive exterior sound with a moderate interior tone from the tuned Super 50 Series muffler
    • Bolt-on installation using factory hanger locations, with all parts and hardware included
    • DOR/DOS design lets you exit behind the rear wheels for towing or straight out the back for looks
    • 16-gauge mandrel-bent stainless steel tubing and 3.00-inch polished stainless tips for flow and style
    • CARB compliant and emissions-legal, backed by a Lifetime Limited Warranty
    • Purpose-built for the 2006-2008 Dodge Ram 1500 4.7L, fitting 2WD and 4WD (except MegaCab)
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 817425
    • Deep, aggressive exterior sound with a moderate, drone-free interior tone
    • Direct bolt-on fit for 2000-2006 Toyota Tundra 4.7L (2WD) using factory hanger locations
    • 16-gauge mandrel-bent stainless tubing and a Super 50 Series muffler for strong flow and performance
    • Two tailpipe exit options — behind the rear wheels for towing or straight out back for a muscular look
    • Emissions-legal and CARB compliant, finished with polished 3.00-inch stainless tips
    • Includes all parts and hardware plus Flowmaster’s Lifetime Limited Warranty
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 817428
    • Aggressive exterior tone with a moderate interior sound that won’t drive you out of the cab
    • Heavy 16-gauge mandrel-bent stainless steel construction for lasting durability and strong flow
    • Includes the stainless Super 40 Series performance muffler and polished 304 stainless tips
    • Dual 2.50-inch tailpipes offer two exit options — straight out the back or side-exit for towing
    • CARB compliant and made to fit 1999-2007 (2007 Classic Only) GM 1500 Ext Cab/Short Bed 4WD trucks
    • Complete kit with all hardware and instructions for an easy at-home install
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 817432
    • Adds improved horsepower and torque with a moderate, aggressive performance tone inside and out
    • Built entirely from durable 409S stainless steel with mandrel-bent 2.50-inch tubing
    • Dual tailpipes exit both sides behind the rear tires, finished with 3.00-inch polished Flowmaster-embossed tips
    • Complete bolt-on kit with instructions and all hardware for an easy at-home install
    • CARB compliant and backed by Flowmaster’s Lifetime Limited Warranty
    • Fits 2005-2012 Toyota Tacoma 4.0L (not standard cab or X-Runner)
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 817435
    • Heavy 16-gauge mandrel-bent stainless steel construction for long-lasting durability and maximum flow
    • Super 50 Series muffler delivers an aggressive exterior tone with a moderate interior tone that won’t drown out cab conversation
    • Choose your exit: true dual rear or dual side-exit behind the rear wheels — ideal for towing
    • Dual 2.50-inch tailpipes clear the factory spare tire, finished with polished 304 stainless tips
    • CARB (California) compliant and includes all hardware and instructions for an easy at-home install
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 817480
    • Complete cat-back dual exhaust delivering an aggressive exterior tone with a moderate, drive-friendly interior sound
    • Dual 2.50-inch mandrel-bent stainless steel tubing paired with the Scavenger Series X-pipe for maximum scavenging and a deep tone
    • Super 40 Series performance mufflers offer more internal volume to handle Hemi flow demands
    • Highly polished 304 stainless steel 4.00-inch dual tips exit straight out under the rear valance
    • Uses factory hanger locations and includes all hardware for an easy at-home installation
    • CARB compliant and backed by Flowmaster’s Lifetime Limited Warranty
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17213
    • Includes a pair of Super 44 Series mufflers tuned for that iconic deep, aggressive 5.0L Fox body sound
    • Bolt-on installation using factory hanger locations, with all hardware and easy-to-follow instructions included
    • Free-flowing 2.50-inch aluminized steel mandrel-bent inlet pipes and tailpipes for smoother exhaust flow
    • Long 2.50-inch 304 stainless steel dual tips deliver a genuine show-car look
    • Emissions-legal and CARB (California) compliant to keep your Mustang street-legal
    • Fits 1987-1993 Mustang LX and 1986 Mustang GT with 5.0L, coupes and convertibles
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 817481
    • Aggressive exterior sound with a moderate interior tone, tuned by Super 44 Series performance mufflers
    • 3.00-inch mandrel-bent stainless steel tubing and a Scavenger Series X-pipe for maximum power and a deep tone
    • Dual tailpipes with large 4.00-inch polished 304 stainless steel tips that fill the factory valance cutouts
    • Easy bolt-on install using factory hanger locations, with all hardware and instructions included
    • Emissions-legal and CARB compliant, backed by Flowmaster’s Lifetime Limited Warranty
    • Purpose-built for 2010-2013 Camaro SS 6.2L coupes (does not fit NPP quad-tip models)
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 817490
    • Frees up power and sound on 4.7L and 5.7L Hemi 2009-2024* (classic body) RAM 1500 4WD trucks
    • 50 Series HD muffler tunes in an aggressive exterior tone while keeping cab drone to a minimum
    • Durable 16-gauge mandrel-bent stainless steel tubing with dual polished 3.00-inch tips
    • Choose dual side exit for towing or straight rear exit for a muscular look
    • Complete kit with all parts and hardware for an easy at-home install
    • CARB (California) compliant for legal, worry-free upgrading
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17234
    • Deep, powerful tone from the large-case 80 Series Cross-flow performance muffler with a moderate-to-aggressive exterior sound
    • Full 3.00-inch mandrel-bent aluminized steel tubing improves throttle response, power, and mileage over the restrictive factory exhaust
    • Dual 3.00-inch polished stainless steel tips deliver a muscular, traditional dual-exhaust look
    • Bolt-on install using factory hanger locations, U-Bolt clamping, and all included hardware
    • CARB (California) compliant with Emission Code 5 and configured for 2WD applications
    • Backed by Flowmaster’s 3-year Limited Warranty
  • Flowmaster American Thunder Axle-back Exhaust System
    SKU: 817460
    • Dual Super 44 Series mufflers deliver Flowmaster’s iconic deep, aggressive rumble
    • 2.50-inch mandrel-bent stainless steel tubing for smooth, high-flow performance
    • Polished 4.00-inch stainless tips embossed with the Flowmaster logo for a finished look
    • Uses factory hangers and includes all parts and hardware for easy installation
    • CARB (California) compliant and backed by a Lifetime Limited Warranty
    • Fits 2005-2010 Mustang GT, GT500 and California Special coupes and convertibles (4.6L/5.4L)
  • Flowmaster American Thunder Crossmember-Back Exhaust System
    SKU: 17281
    • True dual crossmember-back design with a built-in H-pipe crossover for a fuller, balanced sound
    • Dual Super 44 Series mufflers deliver a moderate to aggressive interior and exterior tone
    • Built from 16-gauge mandrel-bent aluminized steel with 2.50-inch tailpipes for durable, smooth flow
    • Delivers improved throttle response, power, and mileage like all Flowmaster systems
    • Includes 3.00-inch polished stainless steel tips plus all hangers and hardware for installation
    • CARB compliant and backed by Flowmaster’s 3-Year Limited Warranty
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17287
    • Delivers a deep, mellow, moderate tone from the 70 Series Big Block II muffler without excessive drone
    • Scavenger Series Y-collector and 3.00-inch mandrel-bent piping boost scavenging and torque
    • CARB (California) compliant and emissions-legal for street use
    • Bolt-on design uses factory hanger locations and includes all hardware for easy at-home installation
    • Custom-fit for 1996-1999 Silverado / Sierra 1500 with the 5.7L engine
    • Backed by Flowmaster’s 3-year Limited Warranty
  • Flowmaster American Thunder Axle-back Exhaust System
    SKU: 17421
    • Built from 16-gauge mandrel-bent aluminized steel with 60 Series Delta Flow mufflers for durable, free-flowing performance
    • Improves throttle response, power, and mileage while adding an aggressive American Thunder tone
    • Large 4.00-inch polished stainless steel tips fill the rear valance cutouts for a muscular, integrated look
    • Moderate interior and exterior sound level lets your performance be heard without overwhelming the cabin
    • CARB (California) compliant and includes all parts and hardware for an easy axle-back installation
    • Fits both coupes and convertibles in 2WD applications
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17328
    • Deep, powerful exterior tone with a moderate interior sound thanks to the dual inlet 50 Series Big Block muffler
    • Delivers improved throttle response, power, and mileage like every Flowmaster cat-back system
    • 3.50-inch aluminized tailpipe exits behind the right rear wheel — ideal for towing setups
    • Finished with a large 4.00-inch polished 304 stainless steel tip embossed with the Flowmaster logo
    • CARB (California) compliant with all necessary parts and hardware for an easy, bolt-in install
    • Direct fitment for 2001-2006 (2007 Classic) Silverado / Sierra 2500HD/3500HD with 6.0L or 8.1L engines
  • Flowmaster American Thunder Crossmember-Back Exhaust System
    SKU: 817129
    • True dual crossmember-back system with a built-in H-pipe crossover for balanced flow and tone
    • 16-gauge mandrel-bent stainless steel tubing for durability and unrestricted exhaust flow
    • Super 44 Series mufflers (P/N 842546) deliver a moderate to aggressive interior and exterior tone
    • Improves throttle response, power, and mileage — hallmark Flowmaster performance benefits
    • Includes all hangers and hardware for an easy, straightforward installation
    • CARB (California) compliant with a 2.50″ inlet and dual tail pipes
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17350
    • 3.00-inch mandrel-bent aluminized steel tubing delivers efficient flow, improved throttle response, power, and mileage
    • 50 Series Big Block muffler tuned for a deep, moderate exterior tone with a mild-to-moderate interior tone
    • Finished with a large 3.50-inch polished 304 stainless steel tip for a subtle custom look
    • Uses factory hanger locations and includes all necessary parts and hardware for easy installation
    • CARB compliant and especially recommended for towing applications
    • Backed by a 3-year Limited Warranty
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17358
    • Direct-fit cat-back system for 1998-2002 Camaro/Firebird with the 3.8L engine
    • 80 Series Crossflow muffler delivers a deep, muscular exterior tone with a moderate interior sound
    • 2.50-inch mandrel-bent aluminized steel tubing improves throttle response, power, and mileage
    • Dual 2.50-inch tailpipes with large 3.00-inch polished stainless steel tips for a true dual look
    • CARB (California) compliant and backed by a 3-year Limited Warranty
    • Includes a specially tuned resonator plus all necessary parts and hardware for an easy fit
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 817471
    • Heavy 16-gauge mandrel-bent stainless steel construction built for durability and maximum flow
    • Included Super 50 Series muffler delivers an aggressive exterior tone with a comfortable, moderate interior tone
    • Dual 2.50-inch tailpipes offer straight rear-exit or side-exit options — ideal for a true dual look or towing
    • Polished 3.00-inch 304 stainless steel tips embossed with the Flowmaster name
    • CARB compliant and backed by Flowmaster’s Lifetime Limited Warranty
    • Complete kit with all parts, hardware, and instructions for easy at-home installation
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17367
    • D.O.S.S. dual-out-same-side design delivers the aggressive NASCAR race truck look and stance
    • 50 Series HD muffler tunes a moderately aggressive exterior sound with a moderate interior tone
    • Dual 2.50-inch mandrel-bent tailpipes improve throttle response, power, and mileage
    • Finished with dual 3.00-inch polished stainless steel tips for a clean, high-quality appearance
    • CARB (California) compliant with all necessary parts and hardware included for easy installation
    • Backed by a 3-year Limited Warranty
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17368
    • Deep, muscular exterior tone from the Super 50 Series muffler with a built-in Helmholtz chamber to control interior resonance
    • High-flow 3.00-inch mandrel-bent aluminized steel tubing feeding dual 2.50-inch side-exit tailpipes ideal for towing
    • Polished 3.00-inch 304 stainless steel tips deliver a finished, true dual-exhaust look
    • Bolt-on installation using factory hanger locations with new hangers and U-bolt clamps included
    • CARB compliant and street legal in all 50 states, backed by a 3-year Limited Warranty
    • Direct fit for 2000-2003 Tahoe and Yukon with 4.8L or 5.3L engines, both 2WD and 4WD
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17392
    • Aggressive NASCAR-inspired tone from the included Super 40 Series performance muffler for a deep, powerful sound
    • D.O.S.S. dual-out-same-side design with dual 2.50-inch tailpipes and polished 3.00-inch stainless steel tips
    • 3.00-inch mandrel-bent aluminized steel tubing keeps flow smooth and consistent through every bend
    • CARB (California) compliant with Emission Code 5 for street-legal peace of mind
    • Complete kit includes the muffler, all hardware, and instructions, backed by a 3-year Limited Warranty
    • Fits 2WD and 4WD standard cab / short bed trucks on a 119-inch wheelbase

Showing 1–24 of 170 results