Air filter Replaces OEM number:
Robin EX13, EX17, EX21 ；2773260618；2773261107；261-32601-07；2613260107;220-32812-04;2203281204;261-32601-17
2613260117;2613260218；20A3263603;277-32619-17
Robin Subaru Engine Air Filter 277-32611-07 #20A-32636-00
Wacker 0156759 ;21551200；EX-17/EX-21
