At the end of this month I'm having a whipple installed with all the supporting mods and going to have the car tuned to a 600hp level. Car has 29k miles on it and I want to upgrade to a centerforce dfx 26 spline clutch and input shaft. I know it is gonna cost me an extra grand to do it . So I was wondering if I should just upgrade the clutch with the stock input shaft and spend the rest on the IRS bushings,brace,etc or spend the money and get it done now. any replies would greatly be appreciated, just not smart ass ones. thanks sonicblur03