2003 corolla sportivo any ideas on how much i will gain i know its up to me (the driver) but just a rough idea? and also the clutch seemed to be slipping bt only in high revs is that a sign i definately need a new clutch or something else? your cluth will be okay for a bit longer, but hey what a good opertunity to get the heavy duty one! and may as well get the fidanza flywheel while your at it ok... any ideas on price ? just for the clutch only not labour and the fly wheel as well?