The Cloyes Stock Replacement Double Roller Timing Chain Set is designed for Chevy, Chevrolet, GMC engines with sizes 396, 402, 427, and 454 big blocks. This timing kit includes a CRANKSHAFT GEAR, Timing Chain, and CAMSHAFT GEAR, providing essential components for maintaining proper engine timing. Manufactured by Cloyes Gear & Product, this set ensures quality and reliability for your vehicle. Perfect for those looking to replace worn-out or damaged timing components in their engine, this product is a crucial part of ensuring smooth and efficient performance.