BBM Head Gasket

The BBM Head Gasket (FEL1105) is a precision cylinder head gasket engineered for Mopar B and RB-series engine blocks. This critical sealing component prevents combustion gas and coolant leakage between the cylinder head and engine block, making it essential for engine reliability, performance, and longevity. Whether you're rebuilding a classic Mopar muscle car or restoring a heavy-duty truck engine, this gasket delivers OEM-level sealing integrity.

This head gasket features a steel core laminate construction with a 4.590-inch bore diameter and 0.051-inch compression thickness, designed to withstand high combustion pressures and thermal cycling without degradation. The steel core reinforcement prevents gasket creep and blowout under extreme engine loads, while the laminate layers provide consistent sealing across the entire combustion chamber. The precision bore diameter ensures proper alignment with your specific engine block, creating a uniform seal that maintains cylinder pressure and prevents coolant bypass.

Engine rebuilders, performance enthusiasts, and restoration shops rely on this gasket for Mopar B-block (340, 360) and RB-block (383, 400, 440) engines across trucks, muscle cars, and industrial applications. Proper installation requires careful surface preparation of both the block and head decks, along with correct torque sequencing per engine specifications. This single gasket unit is an economical choice for complete engine overhauls where OEM fitment and reliability are non-negotiable.