I think that Stage 1 will only make better use of what's already available - AFAIK it keeps the 1st and 2nd gear boost restrictions (wheras the MBC will remove that at the risk of your transmission) and uses the fuel/air better throughout the range.
I thought that stage 1 was a wastegate control and fuel map programme to better utilise stock components for an increase in power:
a] The wastegate is opened at higher boost from 3rd gear.
b] The fuelling map is increased accordingly to minimise the chance of knocking [pre-ignition] under high load/speed.
sailorcolin... i don't know if you know... but this section of the forum is for 94-02 900's and 9-3's... i was looking at your profile and it says you have a 1990 900 s and i believe as far as they are concerned you can get a red apc box... but as far as stages??? but if you do have another car i don't know about stormcrow already gave you the answer... good luck...
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