cam gears, boost controller ( get a good japanese one ), -9s turbos, front pipes ( the stock 33 dumps are good at that level but the a good set like the CES ones will give a bit more and since you'll be there any way), Z32 AFMs ( get the apex'i pod kit to suit ), 600cc+ injectors, nismo pump and a PFC then a tune
open up the out let of the stock manifolds when fitting turbos
this with 19-20psi will see you clear of 300rwkw
this is basiclly the setup I had on my R34 ( I had -7s, stock AFMs and airbox ) and on 19psi it it made 312rwkw