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Flowmaster's American Thunder cat-back exhaust system for the 2014-2018 GM 1500 trucks (also fits 2019 classic models) is perfect for the person looking for an aggressive sound level inside and outside of the truck, with all of the performance benefits that you would expect from Flowmaster. This bolt-on DOR/DOS (Dual Out Rear/ Dual Out Side) emissions-legal system, for the Crew Cab and Double Cab models with 4.3L V6 or 5.3L V8 engine, features a stainless steel Super 40 Series muffler and dual 2.50" stainless steel mandrel bent tailpipes. The system finishes off with polished 3.50" stainless steel tips. 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.
|Exhaust Series||American Thunder|
|Exit Position||Dual Out Rear|
|Exit Position||Dual Out Side|
|Heat Shield Attached||No|
|Inlet Diameter||3.000 in.|
|Inlet Inside Diameter||3.000 in.|
|Muffler Part Number||Kit Only|
|Muffler Series||Super 40 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||3.500 in.|
|Tip Length||13.000 in.|
|Title||Flowmaster 817669 Cat-back System 409S - Dual Rear/Side Exit - American Thunder - Aggressive Sound|
|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.
An upgraded exhaust system is one of the easiest modifications that offers an immediate, noticeable performance improvement. Whether you’re cruising an M3 or modding a diesel truck, an upgraded exhaust will open up the restrictive factory system, allowing your engine to breathe better and deliver peak power! From lighter weight exhaust headers to improved cat-back systems, to better sounding mufflers, modifying your exhaust setup is a great place to express the character of your ride in a unique and cost effective way. Whatever you’re looking for in a modified exhaust system, we can provide the absolute best systems to make your vision a reality.
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.
The best modders use Wheelwell to build their dream rides.