Ray, thanks . I agree with you that the Upsolute is a good inexpensive way to give one's non-SRT crossfire a nice boost without getting so radical as some of the other methods I've read about. I am going out this weekend and get the K&N's. I appreciate the advice. That is what is so great about this forum. Basically only crossfire owners are here and the sharing of information and ideas between us is just wonderful. Different points of view and levels of knowdledge exchanged freely. As far as I'm concerened we have a real nice " club" right here. I'm going for the Upsolute very soon.