Dart Chevy Big Block Pro1 Cylinder Head - 310Cc Port / 121Cc Chamber

Dart Pro1 Aluminum Big Block Chevy Cylinder Heads are the perfect choice for street performance and mild bracket racing applications. Designed for engines under 7,000 RPM and up to 500 cubic inches, these heads deliver excellent midrange torque and power, making them ideal for heavier vehicles that require reliable, efficient performance.

Inspired by Dart’s championship-winning Pro Stock designs, the PRO1 heads feature race-proven elements such as rolled valve angles, improved spark plug locations, extra-long intake valves, raised exhaust ports, and fast burn combustion chambers. The 310cc version offers exceptional airflow and power, yet is compatible with off-the-shelf pistons, valve train components, and intake manifolds for ease of use and cost-effectiveness.

Built for durability, these heads are equipped with long-wearing bronze valve guides, screw-in studs, multi-angle intake seats, and hardened, radiused exhaust seats. Best of all, Dart’s precision cast ports ensure outstanding airflow without the need for time-consuming porting. Assembled with stainless steel valves, premium springs, locks, retainers, guide plates, and seals, Dart Pro1 Aluminum Big Block Chevy Cylinder Heads are engineered to perform. Heads are sold individually.