BCisme

i don't think it'll trap 128 mph. at the detroit auto show they claimed a roots style blower making 8.5 psi. it'll be more powerful that the 03/04 cobra, but i dont see it trapping much more that 117 or so. also, the only upgrade you'll need is a twin screw blower like the 03/04's. cams will be nice, but not necassary to make 600 rwhp. heads cams and cai (remember Theorem1 there is no manifold on these cars) wouldnt do it, because even with a pulley swap and porting the roots blower still cannot flow enough or as much as a twin screw. ported heads would actually cause it to lose boost pressure. also, just like the PI heads, no one makes an aftermarket 4V head casting, so this swap wouldn't be possible anyways.