Hi Jason the top bike is Jack Frosts, he uses air/air I don't know I think the fittings in the tank are take-off, or possibly nitrous.
The black bike is Flying Dutchmans, one of the lines into the top of the tank is the return, the other is a breather as I understand. That's Big Frank standing behind the bike I think talking to Zedhed, who has built his own zx-11 turbo with a really funky home-made programmable dashboard I'll see if I can find a pic of that.
Got-Busa - send me your email and I'll pass on the results when they come.
ZX-Alan: 106dB noise limit as Woodbridge and no open pipes allowed from this year, unfortunately. we love our dump-pipes but the locals don't seem to share in that