I would save for a swap, H22a. it should run you 3k or so. then do your normal bolt ons (i/h/e). If you dont have the money for a swap and you just want to blow your money away then go ahead do put i/h/e on the S motor. IMHO, its just not worth moding it. You can buy a used intake for like $50 for now if you want to make it sound mean
hummm im not believing the S w/ cai and exhaust was beating Si's maybe if you were a good driver and they had an AT or didnt know how to drive. The S' are pretty slow.
T