This oil breather tower installs on the stock alternator/generator stand.  Not only does it provide a distinct Porsche style look to your engine, it induces vacuum from dual carburetors to scavenge crankcase pressure, helping to eliminate oil leaks at the crank pulley and elsewehere. It is baffled internally, and provides two nipples to vent to your dual carb air cleaners, and can be plumbed to an external breather box.  Breather, mounting plate, o-ring, oil filler cap. filler cap o-ring, and stainless steel mounting screws are included in kit. Fits stock oil filler cap.