Question?? Was asked why 2 extra ports in intake side of cyl. after hogging out ports sometimes you loose some of your botom end and mid range. by putting these extra ports in ,It helps to bring back some of the bottom and mid range. and also adding the hole or port to the piston on the intake side this also helps to improve the bottom and mid range after porting,It also helps to lube the wrist pin and bearing.Also it smoothes out the power delivery everywhere.Others ask why we add lube holes to the piston ? This helps piston lube at high R.P.Ms and also helps lube the engine when comming off a long hill with the throttle closed.