Air filter Laboratory Tests per ISO 5011 at least 99.5% efficiency (Based on Wix 42389). Air Filter. Engine Air Filter. Established in 1959! The engine types may include 2.0L 1995CC 122Cu. H4 GAS DOHC Naturally Aspirated,2.4L 2393CC l4 GAS DOHC Naturally Aspirated,2.5L 2474CC 151Cu.