well i got the basic bolt on in my b20b like the headers, blox manifold etc. and i was thinkin bout gettin my ecu flush and tune the motor tuned...so im i gonna get any differece when i get it tuned?? and the other thing should i get this JG head its port and polish head and 3 valve angle job with cams, cam gears, vavlve springs, retainer etc...so should i get the head and slap it on and get it tuned or just tune my stock motor with the stock bolt on?? cuz i wasnt really gna build the motor i wanna get a type r...so please give me some ideas...thnx