Again, Thank you to everyone for the assistance, and new opinions and ideas are always a good thing. oface- I'm not sure where to get the FIPK for the X yet, and I don't know if the actually make one yet. I e-mailed the tech at k&n, but who knows how long the reply will take, about if the have or if it is in the works for an FIPK for the Xterra. So, I'm gonna play the waiting game for now, but I'll certainly make sure to post any info I get concerning the intake. And as for now, for all those who have put in their two cents, I'm planning on going with the calmini cat back exhaust (side exit)! thanks again all!