The product is a vintage Yamaha XT500C XT500 XT 500 C intake/exhaust valve rocker arm, manufactured in Japan with the part numbers 58312151 and 583-12151. This valvetrain component is specifically designed for Yamaha motorcycles, providing essential support for engine performance and durability. Perfect for motorcycle enthusiasts looking to maintain or restore their classic Yamaha XT500C, this authentic part from the manufacturer ensures quality and compatibility with the original design.