This 1962-1965 Chevrolet Corvette Idler Pulley assembly is an OEM vintage performance part specifically designed for the 340 HP or 365 HP 327 with 4-speed transmission. With a brand name of Chevrolet and being classified as a performance part, this idler pulley is essential for maintaining proper belt tension and ensuring optimal engine performance. Whether you are restoring a classic Corvette or looking to upgrade your engine with a 340 HP or 365 HP engine, this idler pulley assembly is a crucial component to keep your vehicle running smoothly.