well the way im seeing it is that it's your lower intaje manifold, the only real good aftermarket intake for the 96-98 2v is the reicard racing manifold but it is like $1500 and not really a wise choise for a street car. what i would do is go and get a shop manual and change the lower intake myself, its not really that hard is you take your time and do everything to the best and not half-ass anything.

also i have already invested in the PI head swap for my car but if you do the swap you are looking at aboput $2000 for the heads and new intake and about 50rwhp. also the new heads are ALOT better than the 96-98 which are pretty much impossible to make good power out of. if you plan on making any real good power then you might as well do the head swap, but if not just replace the intake and throw on a blower!!!!!