but than a k&n you have to clean out ever 10-12k and replace every 30k anyway. Just dont touch it it's simple. Replace at 30k.
K&N have a million mile warranty so where you get your info from is beyond me!
people will do it there own way I just said how things work for me. Rather a lot of cash to pay out everytime the filter gets dirty my apexi gets filthy after a year or 7k miles if I left it until 30k there wouldn't be any air getting in! A lot of people don't run filters so at least something is stopping the crap getting in, mine still works fine and its due to be cleaned again soon which hasn't harmed it twice in the last 2 years.
What would you rather do run it dirty reducing power, try cleaning it or just spend 100quid + for a new 1?? I know which I'll keep doing.