Oil Catch Can Kit Small RTMG Performance for 1.8 / 2.0 TSI - Blue 17mm - RTMG-901-0178 - 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 Oil Catch Can kit 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 three-stage 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 Monoblock Three Stage Baffling System Oil Level check with a dipstick Drain-in-seconds system with drain valve Serviceable three-piece design 16 mm Barb Fittings Reduces Carbon Build Up Small Dimensions & Capacity : 120 x 80mm - 300ml Large Dimensions & Capacity 160 x 80mm - 400ml Fits 1.8 / 2.0 TSI Engines with code: BZB, CDA, CJE, CAW, CCT, CCZ  * Does not fit the BYT engine