I just installed the JLT CAI.......I dont know if its just me, but it sounds different for sure. Maybe a little better response, but hard to tell. It seems as though when warmed up and taken for a nice ride it idles a little lower than normal. Talk about delivery, I ordered it last night and it was on my doorstep by the time I got home from work.....wow. Waiting for Bassani high flow cats and x pipe and cat back system to come in, as well as the SCT tuner to come in next. I didnt dyno it before, but may do a run to baseline it.