BMW N54/N55/S55 Breather Oil Cap

Fits all BMW applications that use the two-prong oil tab style oil fill caps. With this breather simply remove your oil cap, install the breather, and instantly free up horsepower, improve turbo draining, and remove crankcase pressure, all while adding a cool look to your engine bay.
Can be used by itself with the stock PCV system to eliminate crankcase pressure, or with any number of PCV setups for the ultimate in crankcase pressure relief