CYL HEADS - RACE

The Edelbrock E-Street Bare LS1 Cylinder Heads (64cc Pair #77617) are designed for GM LS Cathedral Port engines, suitable for high-performance or stock replacement applications. They match factory head architecture for compatibility with stock components. Features include premium manganese bronze valve guides, precision valve seat concentricity for sealing and increased cylinder pressures, patented Clean Cast Technology™ for improved air/coolant flow, and dual spark plug pockets accommodating factory-style tapered seat or gasketed seat spark plugs for wider heat ranges. Manufactured and tested in the USA.