ALUM20064ST2.02/1.601.437

The redesigned Dart Pro 1 chamber features improved fuel distribution, spark plugs located high and close to the center of the chamber, and five-angle intake seats to shear fuel and air. The intake and exhaust faces and ports are redesigned, with profiled valve guide bosses and cleaner casting walls for greater control over flow, heat, and combustion. Multiple intake sizes are available. Made from virgin 355-T61 aerospace aluminum alloy for superior strength. Standard valve angle and spacing allow use of off-the-shelf pistons and valvetrain components. Heart-shaped chambers improve combustion efficiency and fit most standard pistons. Multi-angle intake seats and radiused exhaust seats increase airflow. Hardened exhaust seats are compatible with unleaded gasoline. Manganese bronze intake and phosphorous bronze exhaust valve guides extend life. Choice of angled or straight spark plugs. Spark plug holes machined for gasketed 3/4" reach plugs. Dual exhaust bolt pattern for easy header fitment. Sold individually.