I contacted the guy in charge of sales and research at bullseye power and he said he can make the ballmowheel billet for any turbo depending on the turbo size and combination, he recommends anything above a .67 and dual ball bearing would be worth it because the power increase would be substancial, it doesnt have to be a 4 bolt flage either since the only change that we are going to make is the compressor wheel, minimum order is 25 wheels, with a cost of $300 per wheel and total setup fee of $,1200 to machine the wheels, divide that amoung 25 wheels thats about $348 per wheel, if anybody is interested in purchasing one of these post up.