SBC CNC 18-Degr Cyl Head 250cc Assembled

The SBC CNC 18-Degree Cylinder Head 250cc Assembled from Trick Flow represents a precision-engineered solution for small-block Chevrolet builders targeting serious horsepower and torque gains. This fully assembled head is engineered for enthusiasts and professional engine builders who demand maximum breathing efficiency without the guesswork of port matching or valve train assembly. Whether you're building a street engine, strip racer, or high-performance truck platform, this cylinder head delivers the flow characteristics necessary to unlock additional power from your small-block investment.

The 18-degree architecture optimizes combustion chamber geometry and intake valve angle for improved airflow dynamics across a wide RPM band. With 250cc intake runner volume, this head provides the optimal balance between velocity and flow for mid-range torque and peak horsepower development—substantially better than stock cast iron alternatives. CNC-ported and machined to exacting tolerances, each head arrives fully assembled with precision-ground valves, hardened seats, and competition-grade springs, eliminating the risk of assembly errors that compromise performance. The engineering-first approach ensures consistent valve timing, sealing integrity, and durability across thousands of combustion cycles.

This assembled cylinder head fits all small-block Chevrolet engines (262–400 cubic inches) with standard Chevy mounting patterns, making it ideal for drop-in upgrades on existing builds. Experienced engine builders appreciate the time savings of a fully assembled head, while weekend warriors benefit from reduced assembly risk and guaranteed valve timing accuracy. Weighing 32.94 lbs per head, pair this with matching components—intake manifold, headers, and carburetor or fuel injection—to realize its full potential. Professional installation or expert-level DIY work is recommended to ensure proper torque specs, gasket sealing, and valve clearance settings.