Bruce I am over the farking moon with the tune Sean did. GTB STI has not skipped a beat and I have given it a fair work out over the last two days. Tomorrow will be doing some hills testing in heat and will report back. What stands out though is the way the car idles when I come off the throttle, the response is a huge in improvement. I am re-learning to drive the car now. The tune coupled with the whiteline sway and neg camber upgrade has transformed GTB STI.