Used Spec Super Twin organic clutch for manual pre-LP Gallardo part number SL54SST-O. Max wear limit on discs is 0.020" per disc and they are worn 0.007-0.008" so 40% worn. Minimal heat spotting on steel surfaces as seen in pictures and no warping. Used on SCCA autocross project car with some street driving and many launch control starts. Engagement is very smooth and clutch pedal weight is light - IMHO a very good street clutch. As always feel free to make offers...