R32 GTS-T questions

I just moved to japan and picked up a r32 gts-t and well let just say i need it to go faster.....right now its bone stock and im going to pick up the following parts within the next to weeks:
-3 in exhaust
-downpipe
-front mount intercooler
-boost controller
-intake

so i want to get some where at least in the mid to low 13`s what else would i need..... thanks in advance
Ryan