Flowmaster's Force II Cat-Back exhaust system for the 2011-2018 Dodge Durango R/T is perfect for the person looking for mild to moderate sound levels with all of the performance benefits that you would expect from Flowmaster. This bolt-on DOR (Dual Out Rear) emissions-legal system for the 5.7L Hemi engine features tuned resonators, a Scavenger X-Pipe, two 60 series mufflers, mandrel bent 2.50" stainless steel tubing, and 4.00" diameter polished 304S stainless steel embossed logo tips. This 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 Pipe Max Diameter: 2.500 in.Exhaust Type: SingleExit Position: Dual RearExit Style: StraightHeat Shield Attached: NoInlet Diameter: 2.500 in.Inlet Inside Diameter: 2.500 in.Material: Stainless SteelMuffler Count: 2Muffler Part Number: Kit OnlyMuffler Series: 60 SeriesOutlet Diameter: 3.000 in.Outlet Outside Diameter: 4.000 in.Single or Dual: DualSound Level: Mild/ModerateSystem Type: Cat BackTail Pipe Diameter: 2.500 in.Tip Diameter: 4.000 in.Tip Length: 5.250 in.Tip Quantity: 2Title: Flowmaster 817651 Cat-back System 409S - Dual Rear Exit - Force II - Mild/Moderate SoundTubing Diameter: 2.500 in.WARNING CA Proposition 65: YesWARNING CA Proposition 65 Message: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov