Thank chr*st, some intelligent questions and informative answers Martin, tell me all this talk about A/F fluctuations, do they only effect the smoothness / efficiency of power delivery or can it have a more sinister effect? Also are you saying that with just CAI and removed centre muffler the 8psi map will be a better drive and if so wont I miss that luvely little rush of speed around 4,500rpm that the 10psi map provides? Steve