Art Company for Metal Manufacturing Ltd. Made in Japan, Original Designed for old and classic Toyota cars equipped with the 12R engine. According to the part number shown on the box (13101-31021) and the model (TOYOTA-12R), it is primarily compatible with the following cars (models from the seventies and early eighties): Toyota Hilux: Old models (like RN25, RN30, RN35, RN40) that were equipped with a 1.6-liter carburetor gasoline engine. Toyota Hiace: First and second generation vans and passenger cars equipped with the same engine. Toyota Corona: Some old classic trims (like RT81 or RT100). Toyota ToyoAce: Classic light transport trucks. Important Technical Note: The number written below (0.75) indicates that the piston size is the third re-bore (Over Size 0.75), not the standard size. This means it is used when rebuilding the engine and boring the cylinders by 0.75 mm larger than the original factory size.