SBC 227cc Pro-1 Head 66cc A/P 2.08/1.60 Assm.

The DART SBC 227cc Pro-1 Head 66cc A/P 2.08/1.60 Assm. is a precision-engineered cylinder head designed for small-block Chevrolet builds that seek reliable power and high-rpm durability. This product is ideal for enthusiasts building street performance engines, weekend racers, and rebuilds that require OEM-quality valve train geometry.

The Pro-1 platform balances affordability with proven engineering, making it suitable for naturally aspirated or moderately boosted applications where chamber efficiency and port flow are critical. Built on DART's reputation for precision casting, the SBC 227cc Pro-1 head features a 66cc combustion chamber optimized for stock and mild-compression ratio applications, while the 2.08-inch intake valve and 1.60-inch exhaust valve sizing deliver responsive mid-range torque and consistent high-rpm breathing.

This head is fully assembled, meaning all fasteners, valve seals, and springs arrive pre-torqued and ready for installation. It is particularly beneficial for restorers maintaining original small-block Chevrolet specifications and performance engine builders targeting 5,500–7,500 rpm operating windows.