PUSH ON VALVE COVER BREATHER W/PCV FITTINGThis chrome plated breather cap is ideal for race car vacuum balance systems, as well as OEM applications with positive crankcase ventilation. The breather features a 1" O.D. neck and a 5/8" O.D. breather tube, and an integral metal baffle/ foam element combination. It fits all factory and aftermarket valve covers with a 1.22" diameter hole. Grommet included.