yeh so my mate recomended garret's "Disco Biscuit" Roller bearing turbo?

lol!
but what im saying is, do i have 2 change anything else, i.e intercooler, injectors, manifold etc......



?
a guy who i was meant to be buying one off, said its just bolts straight on.......... hmmmmmmm???
HELP!!! im confused! maybe ill pick a garret up cheap from autosport international this weekend!!
