blk, it is ok to run without remap, but I wouldn't do it fer a long time. She will pop a bit with ya on decel 'til you git the tune loaded. As fer tell'n a difference after the tune? That's the biggest difference I've noticed yet, but that's basically the only perf mod I've done along with the slipon, so guess it doesn't count! :hammer: But yes, you can tell a diffence with the remap. Definitely more throttle response. :-D