I just put in a power commander today and checked the air filter that was in it. Turns out there are two k&n air filters in there. Is this correct cos my 600rr had one filter and alot of the k&n pics just show a flat filter too. Are there two types of k&n filters for the 1000rr? Heres mine. I'm guessing this is correct, just curious. Thanks in advance, John.