These heads deliver significant gains in both power and torque for all Small Block Chevrolet applications - right out of the box. Pro Action SBC Heads are the perfect choice for a variety of performance engines, including street rod, muscle car, oval track and drag racing applications. Standard features include a multi-angle Serdi valve job and the choice of straight or angle plug configuration. Valve springs up to 1.550" and all standard rocker arms and valve train components are accepted.
Advanced port/runner/chamber design & modified water jacket for optimal performance & added reliability
Standard features include multi-angle intake & radiused exhaust valve seats for up to 5% more airflow than the competition