Details
Dart PRO1 CNC ported heads are available with 335cc & 355cc intake runners. 335cc heads fit 500 - 565 cid, the 355cc heads fit 540 - 632 cid. We applied the airflow technology developed in our championship-winning Pro Stock engine program to produce these state-of-the-art heads. Every intake port, every exhaust runner, every valve bowl, and every combustion chamber is 100% CNC machined on special dedicated PRO 1 castings.
Dart PRO 1 CNC heads are professional quality competition cylinder heads. We sleeve the head bolt columns between the intake ports to maximize the cross-sectional area at a critical point in the flow path. The high-velocity raised exhaust ports use Pro Stock airflow concepts that dramatically improve cylinder scavenging and the engine's ability to accelerate quickly. Multi-angle intake valve seats direct the air-fuel mixture into the chamber like an airfoil, reducing turbulence and preventing fuel separation. Fully radiused exhaust seats provide the smoothest possible transition into the ports for hot exhaust gases. Improved cylinder scavenging allows more fuel and air to be burned on the next power stroke. 121cc fast burn combustion chambers.
Dart PRO 1 CNC heads are professional quality competition cylinder heads. We sleeve the head bolt columns between the intake ports to maximize the cross-sectional area at a critical point in the flow path. The high-velocity raised exhaust ports use Pro Stock airflow concepts that dramatically improve cylinder scavenging and the engine's ability to accelerate quickly. Multi-angle intake valve seats direct the air-fuel mixture into the chamber like an airfoil, reducing turbulence and preventing fuel separation. Fully radiused exhaust seats provide the smoothest possible transition into the ports for hot exhaust gases. Improved cylinder scavenging allows more fuel and air to be burned on the next power stroke. 121cc fast burn combustion chambers.
- 335cc & 355cc rectangular intake ports
- 121 cc chambers
- Manley 2.300 x 1.880 stainless valves
- Titanium retainers
- 10 deg locks
- A7 assemblies - PAC1224 dual springs 1.625 OD, 270lbs @ 2.000 installed height (.850 in. max lift)
- A9 assemblies - PAC1248 triple springs 1.645 OD, 333 lbs @ 2.100 install height (.900 in. max lift)
We Specialize in Custom Assemblies with Upgraded Springs, Valves & Retainers
Click here for a Flow Chart.
For BBC PRO1 CNC TOP END KITS click here
Use Manley Head Bolt Kit 42192-102 SEE BELOW
Additional Information
| Manufacturer | Dart |
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