i've bought from them before there good people, although they are more for stock applications the also sell breaks. one good thing is that they allow for local pick up. but i heard bad things from those six puck being too weak and breaking apart. i would not buy that one that the guy is selling you it a trash now that he got a grinder and tried to resurface that pressure plate and flywheel him self.
if you do decide to buy the ebay ones i would recommend this one, but non are as great as the act. good luck
http://cgi.ebay.com/ebaymotors/F1-RACIN ... ccessories