Needing something along the size of 450cc low impedance. Heres the catch they have to be the exact same size as Honda OEM's and still use the Honda manifold o-rings, there for a set of hayabusa ITBs. I've tried DSM 450's and seeing have to enlarge the manifold o-rings and they dont seat as deep as they do in the stock Honda location they are causing a vacuum leak. Also have a set of precision turbo injectors but there's no way for them to fit. Any other options I can go with.