Well if it is any help, I know of a MK2 Leon Cupra that saw the following jump in figures from stock to Revo Stage 2+
Stock = 257bhp @ fly and 230bhp @ wheels
Stock + TBE Milltek and Carbonio = 267bhp @ fly and 241bhp @ wheels
Revo Stage 1 (Boost 6, Timing 6 Fuel 9) + TBE Milltek and Carbonio = 321bhp @ fly and 291bhp @ wheels
Revo Stage 2 (Boost 8, Timing 6 and Fuel
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+ TBE Milltek, Dblias, KMD Fuel Pump, S3 Intercooler = 351bhp @ fly and 319bhp @ wheels.
Said car has had Revo Stage 2+ since its incarnation, but has not yet been checked with current Revo Stage 2+ settings of Boost 9, Timing 6 and Fuel 9.
Hope that helps.