Advanced features include five angle intake seats and back cut valves that provide shear points for the fuel to go into suspension as it enters the combustion chamber. The spark plugs are located as close to the top and center of the combustion chambers as possible, shortening the distance that the flame front must travel and producing a more uniform pressure rise in the cylinder.

Features:
- Premium alloy: Dart aluminum heads are cast from virgin 355-T61 aerospace alloy for superior strength and integrity.

- Bolt on compatibility: Standard valve angle and spacing are retained to allow use of off the shelf pistons and valve train components.

- Heart shaped chambers improve combustion efficiency.

- Multi-angle intake and radiused exhaust seats dramatically improve air flow.

- Hardened exhaust seats are compatible with unleaded gasoline.

- Manganese bronze valve guides for extended cylinder head life.

- Spark plug holes are gasketed for 3/4" reach plugs.

- All cylinder heads sold individually.