The Mishimoto 15-20 BMW F8X M3/M4 Baffled Oil Catch Can in Lime Rock Gray is designed to prevent oil from entering the intake system and reduce carbon buildup. This catch can features a two-piece design with a sealed bottom for easy draining and cleaning, as well as a baffled internal design to ensure the most efficient oil separation. It also includes a mounting bracket, two hose clamps, and a Mishimoto Lifetime Warranty.