IF I was going to put gauges it would be oil temp, oil pressure and boost (only because the ECUdatascan has a 18.5 PSI max reading).

If I had to squeeze in a 4th one it would be fuel pressure.

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[COLOR=Black]Liberty GT Spec B tuned 240 HP & 372 Nm at the hubs.[/COLOR] "Instead of banning high performance cars - ban low performance drivers"