rb20de+T will work well for response... drop in det cam shafts as they are different... adjst cam gear advance intake and retard zorst will net you more response.
intake mani- the ones that bolts on top of the factory one are bent to be better due to longer runners, although the ones like greedy one piece will hinder power/response due to shorter runners
hypergear aint doing too bad, check out the ss range