I made over 400Kw's with a GT35, thinking of going bigger but... make it easier.... but i'm hesitant to increase lag...
As for seeing what you buy, 6Boost is the cheapest and what ever you decide you want he'll get it for you.... and when you decide to get one of his manifolds he'll discount it for you as your a repeat customer...
I know it might seem like im flying the 6Boost flag, but i got screwed oround for 2 months when i bought my turbo, had to threaten legal action to get my money back...
Rang Kyle, got it cheaper and delivered in 5 days...
Plus you get after sale support...