the b16 and itr im's are interchangeable as far as bolt patterns. the b18 is different. you will not aftermarket on all of your parts to reach the numbers, well all besides pistons and cams. go with jdm itr pistons and jdm itr cams. then i/h/c/e then a light fly wont hurt. a little weight reduction wont hurt. sticky tires wont hurt either. the aem v2 is better but not much i dont think. the comptech icebox is the shit(i wish i would have been smart at the time). the best ice box for the money is a homemade one. the best exhause in my opinion is a universal on a custom pipe. the header is up to you. just be sure to get dc or better.(no chikara or anything like that) if you want to get a new im that would be up to you. dont get a new tb there is no need. this should set you up pretty well. good luck.