BBC 310cc Pro-1 Head 121cc R/P 2.25/1.88 Assm

The BBC 310cc Pro-1 Head 121cc R/P 2.25/1.88 Assm is designed for engine builders and performance enthusiasts looking to enhance the potential of big-block Chevy engines. This fully assembled cylinder head is ideal for high-output applications, whether for racing or street/strip setups, providing the necessary foundation for aggressive cam profiles and power delivery.

Engineered with optimized 310cc intake and exhaust port volumes, this head improves mid-range and high-RPM airflow efficiency while maintaining velocity. The 121cc combustion chamber volume, combined with 2.25-inch intake and 1.88-inch exhaust valve diameters, ensures a balanced compression and flow for maximum power across the RPM range. DART's Pro-1 series features precision-ported passages and hardened valve seats suitable for unleaded and ethanol fuels, making it a reliable choice for serious builds.

Ideal for BBC engines ranging from 396 to 502 cubic inches, this head is compatible with both traditional and modern fuel systems. Experienced builders appreciate the pre-assembled, flow-tested design, which reduces turnaround time and minimizes assembly errors on high-value projects. Ensure compatibility with your intake manifold and headers for optimal performance.