The FelPro 1027 Performance Cylinder Head Gasket is designed for Chevrolet Big Block engines with a 4.370" bore and a thickness of 0.039". Made of steel with a coated finish, this high-performance gasket features more than 10 bolt holes for secure installation in the engine compartment. Manufactured in the United States by FEL-PRO PERFORMANCE, this gasket is a universal fitment and is ideal for those seeking a reliable and durable sealing solution for their engine. Please note the California Prop 65 Warning for Cancer and Reproductive Harm. Exact item is shown. New in original sealed packaging, which is in fair condition. Fits Gen IV pass. car and H/P block; Fits Gen IV truck and Bow Tie block; Does not fit Gen V block; Does not fit Gen VI block; Two coolant holes per end; Three lower coolant holes; No brinelling of aluminum heads. Made in USA. No returns if installed. Please review our business policies in our store for information regarding returns, shipping and warranties.