my .02 on this. i installed stainless springs and retainers with a new clutch pack in the Hotrod M944. worked fine on the street for many miles. the 1st track day though they heated up and got soft. i thought i cooked my clutch with all the engine braking (hi-comp 944 w/light flywheel). a Duc racer in the pits had one of those caliper measure type tools and we measured the "resistance" of the stainless and the stock steel (he loaned me a set) and there was a pretty big difference. all was well with the steel springs back in. i rode the rest of the day without issue. so if it's street use or you don't engine brake much they are probably fine. i put the steels that came with the Barnett pack back in and left 'em.