Air Filter, Race, Open Element (K&N Type), Use with most 2 5/16 air filter adapters.
3.5" x 4" (2-7/16" Opening), Angled

Air Filter, Race, Open Element (K&N Type), Style may vary, Small neck for 22mm Mikunis & Walbros..
Will not fit air filter adapters.
3.5" x 4" (1-5/8" Opening)

Air Filter, Race, Open Element (K&N Type), Straight,  Small neck for 22mm Mikunis.

Air Filter, Race, Open Element (K&N Type), Angled , Small neck for 22mm Mikunis.

Genuine K&N. For 22mm Mikunis. 2.65 x 2"

Air Filter, Race, Open Element (K&N Type), Use with most 2 5/16 air filter adapters.
3.5" x 6" (2-7/16" Opening),

Low Profile Air Filter for 24 & 28mm Flat Slide Mikunis. Great for Mini Bikes

Genuine Briggs

Genuine Briggs

Genuine K& N,  Use with most air filter adapters, Angled, 3.75" x 4", Large Opening

Air Filter, K&N, For Stock Assembly. Performance increase when using stock filter assembly

Genuine K&N. For 22mm Mikunis. 2.65 x 2"

Air Filter, K&N, For Stock Assembly. Performance increase when using stock filter assembly