The Pro 2 cylinder heads were designed to make competitive engine building easier and less expensive by incorporating the rugged features of our famous Race Series casting into a ready to use, professional quality competition cylinder head. 100% CNC machined on precision 5-axis machining centers, the Pro 2 head offers awesome power and unprecidented ease of use.

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

- Bolt on compatibility: 2 degree rolled valve angle and standard spacing accommodates all stock accessories.

- Heart shaped 121cc chambers improve combustion efficiency.

- CNC machined for consistency and power.

- Raised spark plug location improves flame travel for a quicker, more complete burn, producing more power.

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

- Hardened exhaust seats are compatible with unleaded gasoline.

- Brass head bolt tubes are inserted between adjacent intake runners to allow the ports to be widened.

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

- Manganese bronze valve guides ensure long term reliability.

- All cylinder heads sold individually.