BBM 240 Cylinder Head 78cc Assembled

The BBM 240 Cylinder Head 78cc Assembled is a high-performance drop-in cylinder head engineered for Mopar B and RB-series engines, delivering the displacement and combustion efficiency demanded by vintage muscle car enthusiasts and performance rebuilds. This fully assembled unit eliminates machine-shop downtime and integration complexity, providing a ready-to-bolt solution for engine builders who prioritize reliability and proven power delivery.

Built for drivers seeking authentic 1960s–1970s platform performance without compromise, the BBM 240 represents the intersection of OEM-specification engineering and modern assembly standards. This cylinder head features a 240 cc intake port paired with a 78 cc combustion chamber, optimized for the breathing characteristics of classic B and RB-series platforms. The dual-valve design incorporates 2.190-inch intake and 1.760-inch exhaust valves, balancing flow dynamics for consistent performance across a broad RPM range.

Aluminum construction delivers thermal conductivity superior to cast iron while maintaining structural integrity under sustained high-boost or high-RPM operation. The straight-plug configuration ensures compatibility with original and period-correct ignition systems, and full assembly—from valve seats to spring retainers—eliminates the risk of incomplete or mismatched components that plague used cores. Professional engine builders and muscle car restoration specialists will find this product invaluable for their projects.