Only the Stage 1 kit was ever released, which was a tad pricey at over $2k. I looked at it - it sounds awesome - but budgetary constraints said no. I have a mate in QLD with the kit fitted and I wanted to do a back to back test with mine at the last Ruptured Budgie Rally but I had to leave early for work so it never happened.
I have been doing a fair bit of work with Mr Beetle to get a 2V map that is simply awesome and we should be done this week. My only concession is a GuzziTech Reverse Cone Megaphone and a (well many actually) well sorted map from Mr Beetle. I think it might well trump the Stage 1 kit, but will need a comparison - perhaps your neighbour is willing sometime? Otherwise I will wait till May in QLD at the Budgie, before we start drinking.
Interestingly the Stage 3 kit was also touted at some stage, which had the pistons upped in compression and maybe some more headwork and a different cam. Light of day was never seen by the two latter stages. Pete is this correct, or am I talking shit again?
Annoyingly, JSG was giving away the Stage 1 Kit at one stage as all the original exhausts were breaking multiple times. I had mine replaced and 2 weeks later they started issuing this kit as a warranty replacement. BIG BUMMER! I believe the ECU was pretty tame in its difference to the original 1200 Sport map. Beetle might comment on that?