IRON21572AP2.05/1.601.437

Dart's Iron Eagle cylinder heads use proprietary Speed Flow™ technology for efficient port designs, improved velocity, and flow. Combustion chambers and ports are redesigned for better breathing and controllable combustion. Casting walls are cleaner and more consistent, leading to better flow and heat control. Features: Standard 23-degree valve angle for use with off-the-shelf pistons and valvetrain components. Standard port location and intake bolt pattern fit most manifolds. Enlarged pushrod holes for clearance with high-ratio rocker arms. 5-axis CNC bowl blended for optimal flow characteristics. Heart-shaped chambers improve combustion efficiency and fit most standard pistons.