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.Warranty Information:Limited LifetimeCalifornia Proposition 65 Chemical Name 1: Nickel (metallic)California Proposition 65 Chemical Name 2: Chromium (hexavalent compounds)Exhaust Series: American ThunderExhaust Type: DualExit Position: Dual Rear Same SideExit Style: StraightHeat Shield Attached: NoInlet Diameter: 3.000 in.Inlet Inside Diameter: 3.000 in.Material: Stainless SteelMuffler Count: 1Muffler Part Number: Kit OnlyMuffler Series: Super 40 SeriesOutlet Diameter: 2.500 in.Outlet Outside Diameter: 2.500 in.Single or Dual: DualSound Level: Moderate/AggressiveSystem Type: Cat BackTail Pipe Diameter: 2.500 in.Tip Diameter: 3.500 in.Tip Length: 13.000 in.Tip Quantity: 2Title: Flowmaster 817669 Cat-back System 409S - Dual Rear/Side Exit - American Thunder - Aggressive SoundTubing Diameter: 2.500 in.WARNING CA Proposition 65: YesWARNING CA Proposition 65 Message: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov