Up for sale is MBRP 2015-2018 600 Switchback Assault 144" Polaris PERFORMANCE EXHAUST RACE SERIES. The vendor part number is 4290213. Please read the title to know what is for sale 4� diameter muffler body Loudest version of canister Very light weight 2 Year warranty Improved throttle response Quick and simple installation Huge weight savings Made from 304 stainless Uses stock springs and hangers Dyno proven performance Flo-bench tested for back pressure