the ECU is exact the same from 2008 RXP_X and 2009 RXP-X RS, only the Intake grate is different , the wing in the Intake grate is more flat on the S modell, o in the wave it is notsogood, but in flat water it is a bit fatser as the RXP-X 08.
the OPAS system on the RS modell is also 4 mm higer mounted on the RS modell, but that can e changed o a RXP-X08 in 2 minutes
if you buy a RIVA RACING Intake grate or a 09 RS Intake gate you will have the same topspeed with a 2008 RXP-X Modell.
at the new 2010 RXT 20 the RS version has differnt ECU maping ( noGPS limiter ). bu the 2 seater RXP 08 and 09 RS have the same EU
