Vargas Turbo Technologies is happy to introduce the first and only available plug and play ONE-WAY crankcase breather kit for BMW G series S58 applications With this breather simply remove your oil cap, install the breather, and instantly free up horsepower, improve turbo draining, remove crankcase pressure, all while adding a cool look to your engine bay. FITS with the engine cover on. Engine cover can be removed, and installed without removing the breather.