Excellent street, strip, oval track and truck or marine performance upgrade. Maximum torque and throttle response from idle to 6,000 RPM. Best for 302-351 cubic inch engines. Works with most standard components.

Small block Ford PRO1 20° 170cc Aluminum cylinder heads feature high flowing as cast ports with profiled valve guide bosses and are bowl blended on 5-axis CNC machining centers.

Standard valve angle and spacing is retained for bolt on compatibility. Exhaust runners are raised .135” for improved flow. Manganese Bronze valve guides are used for long life, and hardened valve seats provide durability with unleaded fuels.

Assemblies include Stainless Steel valves, premium springs, locks, retainers, studs, guide plates and seals.

• Heads are sold individually.