BMW E90 Performance Oil Catch Cans

Modern PCV systems return crankcase pressure along with particulates suspended in that pressurized air back into the intake to be burned off during combustion, but this poses a problem for your air/fuel mixture and can create carbon buildup, especially with direct injection engines. An oil catch can system intercepts that crankcase pressure relief and traps anything that isn't clean air before it enters your intake so you're only burning air and fuel while keeping your valves clean for healthier operation and fewer issues from carbon buildup.