We took our car apart this week to do our build and while we were in there we put in a Mcleod RXT twin disc clutch kit. We were actually quite impressed at the size of the stock 2010 clutch. It's much larger than the previous 07-09 version. Looks like the discs are atleast 1" larger in diameter than the previous year. The entire assembly is thicker and just appears to be much beefier than the older version.
One thing I'll note about the 2010 clutch is that there is no chatter at all when slipping the clutch from a complete stop. Not once have I experience this with our 2010. Although I believe our 08' drove like a dream too and was a pleasure to drive I did notice that the clutch had some slight chatter when trying to slip it from a stop.
Jared