Main Cap BBC Rear Steel

The Main Cap BBC Rear Steel from DART is a precision-engineered cylinder head cap designed for big-block Chevrolet (BBC) engine builds, ensuring OEM-grade reliability and proper sealing integrity. This rear-mounted cap is crucial for containing combustion pressures and maintaining coolant circuit integrity in various applications, including high-performance and stock setups.

Manufactured from steel, the Main Cap BBC Rear Steel provides the durability and thermal stability required in BBC applications. It is machined to tight tolerances, ensuring a proper fit on the cylinder head casting and preventing coolant weeping or blow-by at the gasket interface. The steel construction is designed to withstand the demands of high-temperature cycles, which are common in performance engines.

This cap is essential for anyone assembling or rebuilding BBC cylinder heads, particularly in applications where proper sealing is critical. Whether for a daily-driven truck, a marine engine, or a high-output performance platform, this component ensures that your cylinder head assembly meets factory specifications and performs consistently under load.