Head Gasket Set - BBM

The Head Gasket Set for Mopar B/RB-Series engines is a precision cylinder head gasket engineered to seal the critical interface between the cylinder head and engine block on classic and high-performance B and RB-Series applications. Built with a steel core laminate construction, this gasket set features a 4.505-inch bore diameter and 0.038-inch compression thickness, delivering reliable sealing under sustained combustion pressures and thermal cycling.

The steel core laminate design provides superior durability compared to single-layer gaskets, resisting blow-out and maintaining integrity through thousands of engine cycles. The 0.038-inch compression thickness is precisely calculated for these B/RB-Series engines, ensuring correct combustion chamber volume and compression ratio when properly installed. This gasket set comes as a pair, covering both cylinder head sealing surfaces on a complete engine rebuild or repair.

Mopar B and RB-Series engines remain common in restoration projects, vintage muscle cars, and street performance builds where original specification components are critical. Whether rebuilding a 340, 360, 383, 400, 426, or 440 engine, using the correct head gasket thickness and composition prevents compression loss, coolant leakage, and combustion gas bypass. This gasket set addresses the exacting dimensional requirements of these classic powerplants.

Engine builders and restoration specialists specify OEM-equivalent head gaskets to maintain factory performance characteristics and ensure long-term reliability after a full rebuild. Proper gasket selection prevents costly re-work and guarantees the engine performs within designed parameters.