Not to beat a dead horse, but the performance gain with K&N is way debatable. I took my K&N out of my Frontier and never did put one in my X when I got it. I think my mileage actually got worse and my idle speed was always way too high. I had to step on the brake hard to keep the truck from moving when I was stopped at a light. Took the K&N out and everything was back to normal. I like the re-useability of the K&N, but without an aftermarket exhaust, the performance gain is more imaginary than anything. All just my .02 cents.....and some pocket lint to boot.

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01 SE 4x4
Silver Ice