so here is my two cents on balance shaft removal...Don't do it its not worth it...I work at Mitsubishi and have seen too many things go wrong when you remove the shafts. Think about it this way...when the engineers designed the engine they put them in there for a reason...If they were not necessary they would not have spent the money on them. Engines are balanced primarily for high r.p.m.s...so when you approach anything over 6 grand and you got mods your pushing it to the limits..you want all the balance you can get to eliminate vibrations. the extra 10-20 horse some people say you can get is bogus when your engine blows up...lol i've seen it happen. Now you can argue with me but do your best! again engineers aren't stupid...and they get paid to save money!