There have been a few thread on HT where people were quite disappointed with the s2s2's (after tuning). You'll want to bump the compression some (either mill the head, swap in types pistons, or a combination). I would also recommend either there intake manifold or modifying the euro-r along with a quality header (smsp, hytech, an-r, jun, mugen, hotshot) and last but no least either hondata or uberdata... when it's all said and done you'll be happy with the increase in power

-Mike