Hello everyone, this is my first post on here as I just bought a 00 DiscoII last week. I appreciate all the great info that i was able to get on here before making my purchase. It's got everything i wanted... dark grey color, only 68k miles, brush guard, dvd player/tv, rubber rover floormats, jumpseats & well maintained. Anyways, i purchased this as my 2nd car (winter & off roading use) & I've heard people talking about installing a K&N Air Filter to improve Gas Mileage & hp. Is this something that alot of you have done? Is it an easy install? does this install really make a big difference? Thanks in advance & i look forward to your feedback.