P2M all aluminum mini oil catch tank (250cc) was designed to catch engine blow by by installing in cramp engine bay area.  The oil catch tank can be configured non re-circulated back into the engine bay by installing the breather filter on top of the tank (supplied with the kit). Catching engine blow by is essential to keep your engine clean and along the paths intercooler pipings and throttle body butterfly sticking. Comes with 9 and 15mm hose outlet for install on all Japanese Sports Compact cars