whiteboy-dc4

ok so i bought a turbo kit from my friend and he said its revhard and on the turbo it says .50ar and im curious on how to match up size of wastegate and bov. like the wastegate i was looking at them and what size bar do i need? and how should i pick a bov? sorry i know this is very vague question if u need more details ask me i have never boosted so im new to all the bar and sping stuff