yeah, I've been driving it for about 4 months now. I just never had the need to take it that high. I get on it every so often, but no one likes to pull up next to me and race. Its mostly imports around here, and I think they're scared. This morning, I only let her warm up and then took her out and got on her all the way up to about 5100 rpm. My question is, why when its cold will it go that high and when warm (as in after driving all day) it tops out at 4200. This to me sounds like valve float. When they get hot they have less resistance. Tall me whatcha think...