update:
i've installed the KEP stage2 pressure plate with a 930 (911 turbo) clutch disc. the pedal pressure is a tad harder which can't be avoided if you want a higher-spring (higher grip) pressure plate. it's still easy enough for daily street driving so i believe the tradeoff is worthwhile.
the kicker is the 930 clutch disc is about $80 cheaper than the 951 disc and a stock fit with more surface area and a slightly thicker pad. it's by far a better value and better choice.
engagement and release behavior is identical to the stock setup, except for the already mentioned pedal pressure.
new 930 clutch disc and old 951 clutch disc;
new 930 clutch disc and old 951 clutch disc;
KEP pressure plate;
close up;
