ah iam "sooo sorry" anyway back on topic....u might wanna have a larger cooler like say..600x300x140... "if u wanna go rb26" like col says than trust T517Z would be a good set up for 350-400kw etc.....take the jms r33 gtr for example it has alot of work done to it and it runs near 400kw....so i dont think 6k is enough, jus my 2 cents...dnt want any1 to go crazy flaming