Scooby clinic will also !Removed! your car up.... moving on before i start a rant , Stage modifications as far as i remember is an old Ford and Honda thing, I.e on my Rs turbo it has stage 3 alloy radiator and stage 4 Turbo, on the scooby these dont follow the same heir achy that the other makes do and such it varies from turner to tuner, i.e some may class mine and savages scoobs as custom, where as others may say mine is stage 3 and his is 4 or the other way around.
My advice is just take the mods with a pinch of salt and follow your own route, i just looked on different forums to see which parts where best and would give me the power and reliability i required.