try ask this sifu to tune for you..
http://forum.lowyat.net/index.php?showtopic=1277592&hl=

oopps sorry tot carbie. if n.a mfi let start with cold air intake. just buy a good filter like k&n, simota or apexi. the induction piping can be easily source @ kedai abang then diy the heat shield. next will be ignition cable & plugs. after that go for 4-2-1 mandrel with 2" piping. then can play play with ignition timing & t/b a/f ratio. if got budget then can go for piggyback ecu like dastek unichip and high lift cam.