Brodix 2021012 BB-2 Plus cylinder head for Big Block Chevy engines. Assembled with 2.250in intake and 1.880in exhaust valves, 312cc intake runner, and 119cc chamber. Features 1.550in springs, angle plugs, and A-356 aluminum construction. Designed for high-performance racing, offering increased airflow and horsepower for drag racing applications. Sold as each.