American Thunder

Showing 25–48 of 170 results

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SKU
Product
Price
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17395
    • Delivers a deep, aggressive interior and exterior tone through a Super 40 Series performance muffler
    • Complete cat-back kit with 3.00-inch mandrel-bent aluminized steel tubing, dual 2.50-inch tailpipes, and polished stainless tips
    • D.O.S.S. dual-out-same-side design for the aggressive look of a NASCAR race truck
    • CARB (California) compliant and backed by a 3-Year Limited Warranty
    • Includes all necessary U-Bolt hardware and instructions for installation
    • Fits both 2WD and 4WD extended cab/short bed models on a 143.5-inch wheelbase
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17398
    • D.O.S.S. dual-out-same-side design gives your truck the aggressive look of a NASCAR race truck
    • Super 40 Series muffler delivers a moderately aggressive exterior sound with a moderate interior tone
    • Mandrel-bent aluminized steel tubing supports improved throttle response, power, and mileage
    • Dual 2.50-inch tailpipes finished with large 3.00-inch polished stainless steel tips
    • Includes all necessary parts and U-Bolt hardware for a quick, easy bolt-on installation
    • CARB (California) compliant for street-legal peace of mind
  • Flowmaster American Thunder Crossmember-Back Exhaust System
    SKU: 817158
    • True dual crossmember-back system with a built-in H-pipe crossover and Super 44 Series mufflers for an aggressive-to-moderate tone
    • Built from durable 16-gauge, 2.50-inch mandrel-bent stainless steel tubing for smooth, efficient flow
    • Delivers improved throttle response, power, and mileage
    • Includes all hangers and hardware needed for installation, with tailpipes that exit in the factory location
    • CARB (California) compliant and backed by Flowmaster’s Lifetime Limited Warranty
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17406
    • Scavenger Series Y-pipe with back-to-back D-shaped ports increases scavenging for more power and torque — especially useful when towing
    • 70 Series Big Block II muffler (PN 530702 included) delivers a deep sound outside while keeping a moderate tone inside the cab
    • Choose side-exit tailpipes behind the rear tires for towing or rear-exit under the bumper for a muscular look
    • Bolts up to factory cat pipes using stock hanger locations for a straightforward install
    • Dual 2.50-inch mandrel-bent aluminized tubing finished with 3.00-inch polished stainless Flowmaster-embossed tips
    • CARB (California) compliant with Emission Code 5 for a legal upgrade
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17417
    • Deep, aggressive exterior sound with a moderate interior tone from the Super 40â„¢ Series muffler
    • 16-gauge mandrel-bent aluminized steel tubing with dual 2.50-inch tailpipes and 3.00-inch polished stainless tips
    • DOR/DOS design lets you exit behind the rear wheels for towing or straight out the back for looks
    • Bolt-on install using factory hanger locations with all parts and hardware included
    • CARB compliant and emissions-legal, backed by a 3-year Limited Warranty
    • Direct fit for 2004-2008 Ford F-150 and Lincoln Mark LT with 4.6L or 5.4L engines, 2WD or 4WD
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17419
    • Deep, aggressive exterior tone with a moderate interior sound that won’t overwhelm the cab
    • Heavy 16-gauge mandrel-bent aluminized steel tubing built for durability and maximum flow
    • Includes the Super 50 Series performance muffler (PN 530562) — no extra muffler purchase needed
    • Dual 2.50-inch tailpipes with two exit options: straight-back dual look or side-exit for towing
    • Finished with polished 304 stainless steel tips embossed with the Flowmaster name
    • CARB compliant and includes all hardware and instructions for an easy at-home install
  • Flowmaster American Thunder Crossmember-Back Exhaust System
    SKU: 817174
    • Complete crossmember-back dual system with everything needed for a 1955-1957 Chevy coupe or sedan
    • 2.50-inch mandrel-bent stainless steel for maximum flow, performance and long-term durability
    • Super 40 Series mufflers deliver a deep, aggressive exterior tone with a moderate interior sound
    • Built-in H-pipe smooths the note and eliminates back rap on deceleration
    • Dual tailpipes tucked high for clearance, exiting cleanly under the rear bumper
    • CARB compliant and backed by a Lifetime Limited Warranty
  • Flowmaster American Thunder Crossmember-Back Exhaust System
    SKU: 817390
    • Complete crossmember-back dual exhaust system with new hangers and all hardware included for an easy, ready-to-install upgrade
    • Super 40 Series mufflers and an H-pipe deliver a deep, powerful exterior sound with a moderate interior tone and no deceleration back-rap
    • Built from 2.50-inch mandrel-bent stainless steel tubing with a durable 16-gauge pipe wall for smooth flow and lasting strength
    • Dual mandrel-bent tailpipes exit straight out the back under the rear bumper for a muscular look, with tip style your choice
    • CARB (California) compliant and emission code 5 rated, backed by Flowmaster’s Lifetime Limited Warranty
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17424
    • Deep, aggressive exterior sound with a moderate interior tone thanks to the tuned Super 50 Series muffler
    • Bolt-on installation using factory hanger locations—do it at home with all included parts and hardware
    • Choose Dual Out Rear for towing or Dual Out Side for a muscular straight-out-the-back look
    • 16-gauge mandrel-bent aluminized steel tubing and dual 2.50-inch tailpipes for smooth, free flow
    • CARB (California) compliant and finished with large 3.00-inch polished stainless steel tips
    • Backed by a 3-year Limited Warranty and built specifically for the 2006-2008 Ram 1500 4.7L
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17425
    • Deep, aggressive exterior sound with a moderate interior tone thanks to the Super 50 Series performance muffler
    • Bolt-on install using factory hanger locations, with all parts, hardware, and clamps included
    • Choose your exit: behind the rear wheels for towing or straight out the back for a muscular look
    • 16-gauge mandrel-bent aluminized steel construction with large 3.00-inch polished stainless steel tips
    • CARB (California) compliant and emissions-legal, backed by a 3-Year Limited Warranty
    • Purpose-built fitment for 2000-2006 Toyota Tundra 4.7L trucks
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17428
    • Aggressive exterior tone with a moderate interior sound that won’t drive you out of the cab
    • Heavy 16-gauge mandrel-bent aluminized steel with an included Super 40 Series muffler for durability and flow
    • Dual 2.50-inch tailpipes clear the factory spare and offer two exit choices — true dual rear or side-exit for towing
    • Polished 304 stainless steel tips embossed with the Flowmaster name for a premium finish
    • CARB (California) compliant and backed by a 3-year Limited Warranty
    • Includes all necessary parts, hardware, and instructions for an easy at-home installation
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17429
    • Heavy 16-gauge mandrel-bent aluminized steel tubing built for durability and maximum flow
    • Aggressive exterior tone with a moderate interior tone that won’t drown out conversation in the cab
    • Dual 2.50-inch tailpipes clear the factory spare tire with straight-back or side-exit options — ideal for towing
    • Finished with highly polished 304 stainless steel tips embossed with the Flowmaster name
    • Fits 2WD and 4WD with all wheelbases and includes all parts, hardware, and instructions for easy at-home installation
    • CARB compliant and backed by a 3-year Limited Warranty
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 817417
    • Deep, aggressive exterior sound with a moderate interior tone from the Super 40 Series muffler
    • 16-gauge mandrel-bent stainless steel construction backed by a Lifetime Limited Warranty
    • DOR/DOS design lets you exit behind the rear wheels for towing or straight out the back for a muscular look
    • Dual 2.50-inch tailpipes finished with large 3.00-inch polished stainless steel tips
    • Bolt-on install using factory hanger locations with all parts and hardware included
    • CARB compliant and emissions-legal, fitting 2WD and 4WD 2004-2008 F-150 and Lincoln Mark LT 4.6L/5.4L
  • Flowmaster American Thunder Crossmember-Back Exhaust System
    SKU: 817412
    • Complete true dual crossmember-back system engineered specifically for 1964-1967 GM A-body V8 (2WD) applications
    • 2.50-inch mandrel-bent stainless steel tubing plus a built-in H-pipe for maximum flow and even exhaust pulses
    • Large-case Super 40 Series mufflers included, delivering a moderate to aggressive tone inside and out
    • Improved throttle response, power, and mileage backed by Flowmaster’s Lifetime Limited Warranty
    • Includes all hangers and hardware, with dual tailpipes that exit under the rear bumper for a muscular look
    • CARB (California) compliant for legal, confident installation
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17430
    • Deep, aggressive exterior tone with a moderate interior sound that won’t overpower in-cab conversation
    • Heavy 16-gauge mandrel-bent aluminized steel construction for durability and maximum flow
    • Includes the Super 50 Series performance muffler (P/N 530562) and polished 3.00-inch 304 stainless steel tips
    • Dual 2.50-inch tailpipes clear the factory spare tire and use factory hanger locations for an easy at-home install
    • CARB compliant (Emission Code 5) and backed by a 3-year Limited Warranty
  • Flowmaster American Thunder Cat-Back Exhaust System
    SKU: 818131
    • Durable 409 stainless steel construction with 3.00-inch mandrel-bent pipes for improved exhaust flow
    • Dyno-verified gains of 3 hp and 5 lb-ft over stock at the rear wheels
    • Muffler-delete design delivers an aggressive-to-moderate tone plus added off-road clearance
    • Bolt-on install using factory hanger locations, with all hardware and instructions included
    • CARB compliant and street-legal in California, finished with a polished 3.00-inch stainless tip
    • Backed by Flowmaster’s Lifetime Limited Warranty
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17435
    • Super 50 Series muffler delivers an aggressive exterior tone with a moderate interior sound that won’t drone in the cab
    • Heavy 16-gauge mandrel-bent aluminized steel tubing built for durability and maximum flow
    • Dual 2.50-inch tailpipes clear the factory spare tire and offer straight-back or side-exit (towing-friendly) options
    • Finished with dual 3.00-inch polished 304 stainless steel tips embossed with the Flowmaster name
    • CARB (California) compliant and covered by a 3-year Limited Warranty
    • Includes all parts, hardware, and instructions for an easy at-home installation
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17436
    • Super 50 Series muffler delivers an aggressive exterior tone with a moderate interior sound that won’t drown out conversation
    • Heavy 16-gauge mandrel-bent aluminized steel tubing built for durability and maximum flow
    • Dual 2.50-inch tailpipes clear the factory spare and offer two exit options — straight-back or side-exit for towing
    • Finished with polished 304 stainless steel 3.00-inch tips embossed with the Flowmaster name
    • CARB compliant and includes all parts, hardware and instructions for easy at-home installation
    • Covered by Flowmaster’s 3-year Limited Warranty for added peace of mind
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17438
    • Improves performance and fuel economy with free-flowing 16-gauge mandrel-bent aluminized steel tubing and a Super 50 Series muffler
    • Delivers a moderate, refined exhaust tone both inside and outside the cab — aggressive without excessive drone
    • Includes two exit styles: straight out the back or side-exit behind the rear wheels, ideal for towing
    • Bolt-on installation using factory hanger locations, with all hardware and instructions provided
    • Finished with dual polished 3.00-inch 304 stainless steel tips for a durable, upgraded look
    • CARB (California) compliant and backed by a 3-year Limited Warranty
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 817494
    • Adds up to 17 hp and 19 ft-lb. of torque at the rear wheels for real, measurable gains
    • 60 Series Delta Flow mufflers deliver an aggressive exterior tone with a moderate, drivable interior sound
    • Scavenger Series X-pipe maximizes exhaust pulse velocity for stronger torque and classic muscle car character
    • Fully mandrel-bent dual system improves throttle response, power, and mileage
    • CARB (California) compliant and includes all parts and hardware for a simple installation
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17468
    • Aggressive exterior tone with a moderate interior note thanks to the included 70 Series Big Block II muffler
    • Heavy 16-gauge mandrel-bent aluminized steel construction for durability and flow
    • Dual 2.50-inch tailpipes with two exit options — straight back or side-exit for towing
    • Polished 304 stainless steel tips embossed with the Flowmaster name
    • Complete kit with muffler, U-Bolt clamps, hardware and instructions for easy home installation
    • CARB (California) compliant and backed by a 3-year Limited Warranty
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 17470
    • Aggressive exterior tone with a moderate, cabin-friendly interior sound from the 70 Series Big Block II muffler
    • Heavy 16-gauge mandrel-bent aluminized steel construction built for durability and flow
    • Dual 2.50-inch tailpipes clear the factory spare tire with rear-exit or side-exit options
    • Highly polished 3.00-inch 304 stainless steel tips embossed with the Flowmaster name
    • Includes all parts, hardware and instructions for an easy at-home install, backed by a 3-year Limited Warranty
    • CARB (California) compliant and fits 2WD/4WD extended cab, short bed models
  • Flowmaster American Thunder Cat-back Exhaust System
    SKU: 817522
    • Delivers a moderately aggressive Flowmaster sound inside and outside the cab
    • All stainless steel mandrel-bent construction with a Super 40 Series muffler and dual 2.50-inch tailpipes for strong flow and tone
    • Large 3.50-inch polished stainless tips add aggressive style at the rear
    • DOR/DOS design lets you run dual-out-rear or dual-out-side exits
    • Emissions legal and CARB compliant, fitting 2009-2014 F-150 4.6L, 5.0L, and 5.4L trucks
    • Easy bolt-on install with all hardware included, backed by a Lifetime Limited Warranty
  • Flowmaster American Thunder Crossmember-Back Exhaust System
    SKU: 817202
    • True dual 3.00-inch mandrel-bent stainless steel construction delivers maximum flow and lasting durability
    • Super 40 Series large-case mufflers produce a deep, aggressive muscular tone inside and out
    • H-pipe crossover balances exhaust pressures to add horsepower and torque and reduce deceleration back-rap
    • Improves throttle response, power, and mileage — the signature Flowmaster performance advantage
    • CARB compliant and includes all necessary parts and hardware for an easy, designed-for-fit installation
    • Backed by Flowmaster’s Lifetime Limited Warranty for long-term peace of mind

Showing 25–48 of 170 results