what is that? how much does it cost and how much hp is it good to? i am deciding between rps stage 3 sprung-hub clutch or the arizona clutch. which one is better in your opinions? which one is noisier? i heard that using the lightweight flywheel instead of the toyotat one gives a lot more hp and reduces turbo lag, is this true? also, if i get the arizona clutch can i just keep my flywheel? i have heard that you are supposed to replace it but is it possible to use the one i already have? if so how much work does it take to put it back in because i heard that you have to resurface it or something.