Cat-back System 409S - Dual Rear/Side Exit - American Thunder - Aggressive Sound (817669) | Flowmaster
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 2.50Gg stainless steel mandrel bent tailpipes. The system finishes off with polished 3.50Gg 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.