Our Beautiful RZR front exhaust section is a direct bolt on to factory exhaust components. It is 3 inch diameter piping with the option for a resonator. The resonated option is going to knock the sound level down substantially and give it a deeper tone without sacrificing flow at all. These front sections come with new turbo allen bolts along with allen bolts and nuts for the 3 bolt flange that connects to the rear muffler section. It also comes with 2 o2 bungs for the ability to run a aftermarket wideband if you choose as well as an adaptor for those of you that have the smaller o2 sensor.