Dart has achieved maximum out-of -the-box airflow without time consuming hand blending or CNC porting. Using advanced manufacturing techniques, they cast the PRO 1's ports with incredible accuracy. This precision casting technology duplicates the contours that were previously available only in hand ported heads. Inspired by their Pro Stock designs, the PRO-1 has race proven features including rolled valve angles, extra long valves, raised exhaust ports and 119cc fast burn combustion chambers, yet the PRO 1 can be used with off the shelf pistons, valvetrain components and intake manifolds. You get more power for your money with PRO 1!

Prices per head.