BILLET VALVE COVERSVC Smart Valve Cover has the Clone bolt pattern. It does not fit the stock cast Briggs head. The SVC is more than just a billet valve cover. It was designed around a function; to have better oil control and keep oil in the crankcase where it's needed. The external breather bypass is built into this valve cover and is required for use with our billet head because this head doesn't utilize the internal breather passage. (Stock heads have a passage in