I don't think this turbo in twin form will perform well on any engine unless upwards of 3500cc as you are not able to cheat and run more boost to make the claimed 850-900 hp because it runs out of compressor at 2bar boost. On a 2.6 with let's say big cams revving to 8500rpm the -5 should make the same power as them at around 1.8 bar. A single turbo on the other hand like a t04z, gtx4088 or even gt4294r I think you are able to cheat because if you don't have massive cams or oversize valves to improve the Ve of the engine( which are essential to make the gtrs work well in an rb26/28/30) you can just run more boost to make the power.