This filter is designed to push on to existing rubber breather grommets. Fits many common valve cover breather outlets found on racing vehicles. 1 1/2" tall x 2" diameter with chrome end cap. Fits 1" OD grommets.
Note: Not recommended for use as an oil filler cap. This filter is designed to be installed once and left in place. Repeatedly removing and installing will eventually wear out the flange.