In my CAI Raptor with a Pegasus there is no UAT nor header tank nor pleated paper clunk. Just large size fuel lines, 2 saddle tanks feed into a center tank directly into the pump. The center tank is at least a liter. In all honesty, I have never had a flameout on that, or any jet that I couldn't figure out the reason and it's never been air bubbles. Failed EGT probes, battery died, or ran out of fuel all together, but never air bubbles. Just lucky I suppose.