Universal Carbon Fiber Oil Catch Can - Small Purple With Fume Filter RTMG Performance - RTMG-901-0201 - One common problem of the TSI engines is the carbon build-up on the intake valves. Due to the direct injection fueling system, where fuel is sprayed directly into the combustion chamber, the intake valves are not cleaned by fuel, therefore carbon deposits, a product of oil fumes of the stock PCV system, build-up on the valves. The RTMG Carbon Oil Catch Can can reduce the carbon build up on the intake valves up to 60%. The catch can also prevents oil pooling into the intercooler and intercooler hoses. Our smart filtering system takes care of the lighter vapors, while it also features a unique direct path to the bottom of the catch can for the heavy oil vapors, resulting in cleaning up to 99% of the returned fumes/vapors.   Specifics: CNC Billet Oil Catch Can Cap Carbon Fiber Oil Catch Can Main Body Oil Level check with a dipstick Drain-in-seconds system with drain valve Serviceable AN10 Inlet Barb Fittings 25mm Outlet Reduces Carbon Build Up 625g Weight