I know this is late but i just put a k&n in with my oil change at the weekend with no problems. I had a Ryco Z516 in before an i choose not to replace with the same after reading threads on Ryco oil filters falling apart inside, seals cracking etc.

http://www.ebay.com.au/itm/260934665...84.m1497.l2649

Arrived next day, but no k&n 'bling' sticker like you normaly get :P