227cc CNC Ported 2.080 x 1.600 1.550 Double Spring
64cc Combution Chamber Angled Plugs
Dart PRO 1 CNC heads are professional quality competition cylinder heads. We applied the airflow technology developed in our championship winning Pro Stock engine program to produce these state-of-the-art heads. Every intake port, every exhaust runner, every valve bowl, and every combustion chamber is 100% CNC machined on special dedicated PRO1 castings. Our five-axis computer-controlled machining centers produce compound curves and complex shapes that no human could duplicate with a hand grinder.