get more performance with ZC

hi I have a ZC with lightweight flywheel and a clutch stage one and a exshaust 2 1/4 and a short ram..I would like to know I can put an other modification to the engine to get more power.. maybe a bigger intake manifold.. and TB... or does B18A part fit on a ZC?

i think theres a group buy for cams on thezcr.com check the links in my sig for parts and info about the zc. its just just as much potential and aftermarket parts as any other d-series if you look in the right places. well, maybe not just as much, but you can find any part you want if you look hard enough.