I was considering getting one of the heavy duty clutch kits. http://www.srmotorsports.com/RX8_Clutch_Flywheels.html
I wasn't able to find anyone with one of these. Has anyone gotten one or the extreme one that can comment.

 

I have their lightweight flywheel on my car, but I did not buy it from them. I got it from a guy who won it at one of the raffles at sevenstock. It's a good unit, but their stuff is drastically overpriced. Their clutch kits are ACT units that you can buy other places for much less. I have the Centerforce unit & I love it.