The Mishimoto 15-20 BMW F8X M3/M4 Baffled Oil Catch Can - Black Sapphire is designed to separate oil particles from the PCV/CCV air that would normally be routed back into the intake. This helps to reduce carbon buildup and oil sludge, while improving engine performance and reliability. The can is made from lightweight 6061 aluminum and includes a black sapphire anodized finish for superior durability and corrosion resistance. The kit includes all necessary hardware and fittings for a hassle-free installation.