imho front mount i/c for 4agze u wold gain just a little bit of hp due to cooler intake temp.i found that i lost .2 bar (considerably high) for a 1.0 bar boost when using top mount..got only 0.8 bar when using fmic.i also felt a bit laggy...that's no fun when u r using a 4agze.mebbe the piping had a lot of bends and long length.if u could minimize the bends and length it should reduce the loss.s/c not like turbo where we can adjust the boost controller just like that to gain back the boost we lost. for s/c we need to increase the pulley (crank) more,reduce s/c pulley more to gain boost.susah laa..the best option for me, top mount water to air intercooler.short piping, less boost loss..it worked for me.i think for road use try to use the 3sgte water/air i/c system. we can gain a lot of power from it.just my opinion.any sifu have any other ways? do share..cheers