incoming fuel-air mixture around the valveguide and valve stem for improved ... performance at 1.940 intake valves are the same diameter as stock but ... exhaust valve diameter 1.720 has been reduced by . ... 030 to improve valve to valve clearance for cams with high tdc lifts ... style pistons s&s shovel style valve train components are specifically ... compatible with present unleaded fuels valve springs can handle .590 total lift and ... cams with tdc lifts of .210 on both valves because s&s shovel style heads have ... stock dimensions they readily bolt on with a stock-like ... components installed parts include valve seats guides seals valvesvalve springs ... mm spark plug holes and large-diameter valve seats which are compatible with ... permit the use of larger than stock valves these heads are designed to accept the ...
