because its relevant
K&N Apollo can probably be used with a cheap ebay MAF housing or some other DIY
http://www.knfilters.com/search/prod...?prod=57a-6015
http://i.ebayimg.com/00/s/MTIwMFgxNj...eLw~~60_35.JPG
EDIT: link with more info and additional accessories like inlet transition pieces( its 70 mm to start) to fit 80 mm housing and pipes
http://www.knfilters.com/universal/apollo.htm