Well 4th gear run gave a figure of 304 bhp, so say my car is 304 bhp then?

IHI is a smaller much more efficient turbo than the K03 on the older FSI engine hence the higher numbers than the Mk5. Give AwesomeGTI a call and ask them to send you some prints of REVO stage 2 TSI's they have done aswell, we are all get the same numbers 295 - 300bhp. Not sure what you mean about the K04 vs the IHI, K04 is a different class hands down

Golf R 270 bhp, stage 1 - 310bhp! Stage 2 - 340bhp(ish)?