These air filter adapters are made to make the change from factory box filters to aftermarket open pod filters a snap. Available in 3 variations. Nissan PVC, Mitsubishi PVC and customizable aluminum version for other vehicles.
Customizable Aluminium Filter Adapter for 3″ Inlet Air Filters
Nissan PVC Filter Adapter for 3″ Inlet Air Filters
Follow this link for more information http://www.12v.com.my/Universal-Air-Filters/q?cid=205&doit=showclass