I just had bruce up-load a new map tonight. It re-tuned me alot arouns 3k-5k but left my top end pretty close to where it was. But my car feels alot stronger now. Too bad it's snowing thou ( WTF ). I re did 2 of my grounds that had bad connections and added a 3'rd. I dont know if it helped but the high RPM studder went away a little. And i think the tuning helped a bit too. I am running rich i dont know how much thou. I wish i could afford a HKS Twin Power that woudl help a whole lot period.