Been offered a ecu for my impreza fella says it will fit 99/00 classic, has pink sticker with number on the sticker is A18-000 DIX and 1001056110 and long code in middle of motherboard in unit is A19-001 DS2 N .. now it doesnt state prodrive on unit, but does say STI SP in pink .. is this a genuine PPP upgrade pack to give me the 20bhp boost safely ?

 

Yes, assuming some toe-rag hasn't swapped a standard ECU circuit board into a PPP case, that's the one.

Increase is a bit more than 20bhp - especially given the broader torque curve.