depends on what you want to spend.i have kevin's 4mil drag port and it will out run a stock stroke cub that has no porting i would say.with my setup you will have just the same in as a set of nonported cub cylinders.but if you are like everybody else, every year want to get faster. then the cub would be the way to go, cause there is more work to be done with them to make them faster.its all in what you want