10971142 - 1.437” Dual Springs for Hydraulic Roller or Solid Flat Tappet Cam .620”
Fully CNC ported. Maximum performance/full competition, unlimited oval and super classes. 7,000+ RPM, 400+ cubic inch engines.
Completely CNC machined, the Iron Eagle 23° 227cc CNC heads offer ultimate consistency and performance. With intake ports designed to optimize fuel/air flow efficiency and combustion chambers that offer a more complete and rapid burn, these heads are perfect for big inch small blocks.
Standard valve angle and spacing are retained to allow use of off the shelf pistons and valve train components.
Hardened exhaust seats are compatible with unleaded gasoline. Manganese Bronze valve guides extend cylinder head life.
Heads are sold individually.