Mishimoto 2-Port Universal XL Baffled Catch Can - BlackWith years of oil catch can research and development, Mishimoto has created the most effective oil catch can on the market. The patent pending Mishimoto XL Baffled Oil Catch Can was designed to separate oil particles from the PCV CCV air that would normally have just been routed back to your intake. The internal air diverter increases air turbulence and ensures all the oil sinks to the bottom of the can, leaving nothing but clean air to pass through