Fits Chevrolet small block engines 5/16. Hardened. These precision stampings are carefully formed for exact fit. Each guide plate has been heat treated to increase the hardness and minimize wear. 8 pieces per package. Product Features:for 5/16 PushrodsFlat Style DesignFits 1957 to 1997 283-305-307-327-350-400 Small Block Chevy EnginesMade from High-Quality Hardened SteelNatural Finish