Have questions.. need answers??

h series? maybe u meant k series........but yea the k-series i here is very strong and very responsive to hp gains by any basic mods much like the B-series sibling.........as far as modifying the engine for handling forced induction, i think they make bolt-on superchargers for the RsX without any major modification of the engine itself possibly running as high as 8psi safely, time will tell maybe one for the 03Si is in the works or is already out...........good luck