The Mishimoto 15-20 BMW F8X M3/M4 Baffled Oil Catch Can in San Marino Blue is an engineered solution to reduce carbon buildup in the engine by separating oil particles from the air intake. This oil catch can features a two-piece design with a mounting bracket for easy installation. The internal air diverter turbulates the air longer to ensure all the oil sinks to the bottom of the can. The baffle system uses 50 micron bronze filter to trap oil particles, while the internal air diverter ensures all the oil sinks to the bottom of the can. The San Marino Blue finish adds a unique look to the engine bay.