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For the person who wants the look of a traditional dual exhaust system with all the benefits that a Flowmaster Cat-back exhaust system provides. D.O.R./D.O.S. systems are the perfect choice, and include exit pipes for both dual out rear and dual out side configurations so that you can choose the one that fits your style. American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.
|Exhaust Series||American Thunder|
|Exit Position||Dual Out Side|
|Exit Position||Dual Out Rear|
|Heat Shield Attached||No|
|Inlet Diameter||3.000 in.|
|Inlet Inside Diameter||2.500 in.|
|Muffler Part Number||Kit Only|
|Muffler Series||Super 50 Series|
|Outlet Diameter||2.500 in.|
|Outlet Outside Diameter||2.500 in.|
|Single or Dual||Dual|
|System Type||Cat Back|
|Tail Pipe Diameter||2.500 in.|
|Tip Diameter||3.000 in.|
|Title||Flowmaster 817425 Cat-back System 409S-Dual Rear/Side Exit- American Thunder - Moderate/Aggressive|
|Tubing Diameter||2.500 in.|
*Some manufacturer restrictions apply.
Manufacturer of performance exhaust systems, mufflers, cold air intakes, turbo boost modules, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 5 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels.
Based in California with 3 warehouses across the country, we’re sending out shipments everyday of the week, even Saturdays. Because your next mod shouldn’t have to wait.
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