I'm not sure if you could use a civic si CAI or not. If you have an aftermarket IM, then it will most def. fit, since there is basically no difference between your 96HB and the 99-00 si as far as the engine compartment goes. If you have that pos two stage oem manifold, i dunno. I would try an si one first. If it doesn't fit, then sell it and get a gsr one and try that. You will definitely be able to sell the ones that don't fit for about the same as it will cost you to buy it. Trial and error buying already built CAIs with little to no loss of cash is much better than the frustration of trying to fab your own parts.