i got the manifold for 175, gates can be expensive, a mate has one on his turbo xe falcon that is a cheap 60mm ebay job, costs around $150-$200 and he has not had a problem, would probably cost about $500 all up, but when you consider a good ebc will cost you $400+ and an external gate will work a lot better then its not all that expensive after all, plus it will be a good set up when you go an even beigger turbo in the future.