Brodix 1320000 Dragon Slayer cylinder heads for Small Block Chevy engines. Bare castings with 2.080in intake and 1.600in exhaust valves, 225cc intake runner, and 68cc chamber. Features angle plugs and A-356 aluminum construction. Designed for drag racing, offering increased airflow and horsepower. Requires valve job, porting, and valve train components. Sold as a pair.