BBC 325cc Iron Cylinder Head 118cc Assembled

The Chevrolet Performance BBC 325cc Iron Cylinder Head 118cc Assembled (Part #12562920) is designed for big block Chevy engine builders who are focused on maximizing intake flow and combustion chamber efficiency. This iron casting is ideal for street performance, racing, and high-output engine applications, ensuring reliability under sustained loads.

With specified intake valves measuring 2.180 inch and exhaust valves at 1.880 inch, this head optimizes breathing efficiency across the RPM range. The 325cc intake port volume is tailored for big block applications, while the 118cc combustion chamber enhances flame travel and detonation management. The valve spring pocket diameter is 1.470 inch, suitable for street and moderate racing applications, and the iron construction offers superior heat dissipation and durability.

This assembled unit is perfect for engine builders and performance enthusiasts working on big block Chevy powerplants for various applications, including trucks, hot rods, marine use, and track vehicles. The pre-assembly process eliminates the need for valve lapping and initial setup, significantly reducing build time while maintaining factory precision.