I bought my '03 Evo about a year and a half ago and the previous owner put a set of GSC 264 cams in. Just so there's no confusion, these are the old GSC 264cams, way before the S1's and S2's were even realeased. My question is, would it be worth while to upgrade to S2's, or would the gains be marginal and not worth it? I tried to dig up some info on these older cams, but couln't find much of anything.

BTW - I'm installing a HTA green with all the supporting goodies within a couple weeks.

 

Come on, there's got to be some old school Evo guys that have some input on these cams.