Well the hyper has good power, for a sport engine. It has a really tight pinch. BUt just to let you know in advance most that run a hyper 21 end up buying the OS RG carb, it really wakens up the engine and makes it able to hold a tune. So I dont know what to tell you if you already dont like the OS carb. Maybe look at a different engine then, or gamble on the hyper carb.

More rpm's dont always make it a better engine.