Piston Ring Sets: for Toyota. Bus, Truck, Aristo, Avensis, Caldina, Camry, ... Oil Ring We offer different versions of piston ring sets in original equipment quality as well as for older ... coatings. Piston Ring Types: ♦ UM piston ring sets are designed to suit and fit on both original ... Van Truck, Hi-Ace, Land Cruiser, Hi-Lux, HINO Ranger, Light Bus, Majesta, Cressida, Mega Cruiser, Nadia, Premio, Prius, ...