I like the B16 motor but I would also suggest the B18.Other than that and the usually mods, (intake, headers, exhuast, etc.) the one thing I would suggest that some people overlook is weight-loss. Put your car on a diet, take out anything and everything that you do not need. 3 15 inch subs might impress some ppl, but that added weight is robbing power, so I would not suggest a sound system. If you have AAA and actually use it, take out your spare tire, that will save some wieght. If you have leather seats changing those for racing ones could save weight, theres many many options here.Good Luck