Thanks. Yeah, the ECU upgrade is great. Instead of my power falling off around redline (6800 rpm), now, it makes power all the way to redline (7500 rpm). It was kinda funny racing him cause you could hear him shift and I would hold my gear for about another 5-10 seconds longer. I don't see why the ECU for a Neon wouldn't fit a RS or a GS. I believe the ECU's are in the same spot (infront of drivers side strut tower).