So I bought and installed the MPSC's and will be at the track Monday to Wednesday to try them out. I'll have my other set of RA1's for the rain if I need them. I hope that the lower profile in the rear does not mess up my very well (i.e. took a long time to do) suspension settings and ride height. Now the *** is a bit lower than wirh the RA1's...
I'll keep you posted.
The good news is that the slightly lower final drive (smaller circumference) will help me out of saome of the slower (mid rpm 3rd gear) corners!!

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'06 Cayman S -JIC Cross, Quaife, CCW C14 wheels,MPSC's, Milltek cat back, GT3 seats Schroth harnesses, TC design bar, Pagid yellows, GT3 cup brake ducts,de-snorked, vanilla air freshener