The product is a set of high-performance long slot rocker arms designed specifically for Big Block Chevy engines such as the 396, 402, 427, and 454. Manufactured by Chevrolet, these vintage parts are ideal for muscle cars like Camaros, Chevelles, Novas, and Corvettes. The long slot design allows for high lift cam compatibility, ensuring optimal performance and engine efficiency. Perfect for enthusiasts looking to upgrade their valvetrain components for enhanced power and reliability. #94-MHOTROD