I have been making over 700rwhp on E85 for the last 4 years and the ***same*** clutch has not skipped a beat. FWIW I rarely drive my Z w/out beating on it and I have enough low-mid 10 second timeslips to fill up a mailing envelope! I don't have anything against RPS clutches, but I have noticed my pedal feels lighter than a majority of RPS products I have installed (they are usually heavy duty variants)