I went on SPS the other day and he's selling some sweet candy in there for my 01 sc2 (cam shafts, heads, throttle bodys...). I wanted to jump on rebuilding my head with high temp seals, valves, lifters, and new cam shafts...BUT how much power will a performance cam actually give me? will i feel it (even with a fuel tune?). He also sells a stage 1 all motor head ported and polished...will i feel that as well? I'm under the assumption it may give me 2-10 hp for a head job (no "perversion" intended)... Thanks ahead of time guys.