BBC 375cc Alum Cyl Head Jackel Series Assembled

The FLOTEK BBC 375cc Aluminum Cylinder Head Jackal Series Assembled is a fully assembled Big Block Chevy performance cylinder head engineered for high-RPM engine builds and competition applications. This 375 cubic centimeter intake head combines precision aluminum construction with factory assembly, delivering the flow characteristics and structural integrity demanded by serious engine builders and performance enthusiasts who require a proven, ready-to-install solution.

Specified with 2.350-inch intake and 1.880-inch exhaust valves, this head provides the valve sizing required for efficient fuel mixture scavenging at elevated engine speeds. The 127 cubic centimeter combustion chamber volume supports compression ratios suitable for naturally aspirated BBC platforms, while the 1.620-inch valve springs deliver the pressurization needed to control valve float across the RPM range. The angle plug configuration and aluminum construction reduce mass while maintaining thermal stability—critical factors for engine builders focused on maximizing durability and peak horsepower output in street strip and competition environments.

This assembled cylinder head is designed for engine builders, machine shops, and performance enthusiasts developing Big Block Chevy engines for drag racing, street performance, or engine swap applications. The factory assembly eliminates port matching and valve installation variables, allowing builders to focus on block preparation, camshaft selection, and system integration. Weighing 41 pounds and compact in footprint, the head is ready for immediate installation in your BBC platform once supporting components are properly prepared and matched.

FLOTEK Jackal Series heads represent a performance-proven design tier within the Big Block Chevy market, positioned for builders seeking OEM-quality assembly and repeatable flow characteristics without full custom porting expense. Verify your BBC block configuration, deck height, and intake manifold compatibility before purchase to ensure correct fitment for your specific engine platform.