SBC 245cc Pro-1 Head CNC 66cc A/P 2.100/1.60 Bare

The SBC 245cc Pro-1 Head CNC 66cc A/P 2.100/1.60 Bare by DART represents a premium choice for serious small-block Chevrolet engine builders seeking maximum airflow and cylinder head performance. This bare casting is engineered for enthusiasts who demand precision-ported heads capable of supporting high-RPM builds, forced induction setups, and competition-level power outputs. Whether you're upgrading a street engine or constructing a dedicated race platform, this Pro-1 head delivers the flow characteristics necessary to unlock hidden horsepower across the entire RPM band.

The 245cc intake runner volume provides excellent velocity characteristics for naturally aspirated and boosted applications alike, while the 66cc combustion chamber promotes efficient fuel burn and optimal quench design. The 2.100-inch intake valve and 1.60-inch exhaust valve configuration represents a time-tested combination that balances low-end torque with high-RPM breathing capability. CNC-ported passages ensure consistent wall finish and repeatable flow paths, eliminating manufacturing variances found in traditionally hand-ported castings. This bare head arrives unassembled, allowing builders complete control over final assembly specifications, valve selection, and customization to match their exact engine requirements and fuel octane parameters.

This head suits SBC applications from 302 to 406 cubic inches, making it adaptable across a wide range of displacement scenarios. Builders working with aftermarket blocks, stroker assemblies, and dual-quad or carbureted configurations will appreciate the aggressive porting characteristics and large valve diameters that support peak airflow demands. The Pro-1 designation reflects DART's engineering focus on real-world performance gains—measurable on both dyno and street. Proper installation requires attention to gasket surface preparation, head bolt torque sequencing, and valve seat verification; consulting factory technical data for your specific block compatibility ensures optimal sealing and longevity.