The APR Oil Catch Can traps excessive crankcase oil vapors and gunk from entering the engine. This helps to reduce carbon buildup on intake valves, octane lowering oil vapors and oil pooling in the intake tract. The can drains in seconds with the flick of a knob, and is recommended at all stages of performance. All fittings are -10 AN. This part is not a complete system as it's a replacement part for our existing MS100199 full catch can system. Fits universally on various Audi, VW, Porsche, Seat, Skoda, Cupra, Bentley, and Lamborghini