BBM R/F 2.140in Intake Valve

The MANLEY BBM R/F 2.140in Intake Valve (MAN11890-1) is a precision-engineered component designed for Mopar B/RB-series engine builds where flow optimization and durability under sustained high-RPM operation are critical. This stainless steel intake valve features a 2.140-inch head diameter paired with a 0.372-inch valve stem, delivering the flow characteristics necessary for race and performance applications that demand maximum cylinder-head efficiency.

At 4.873 inches in overall length, this valve is engineered to precise OEM-compatible dimensions while the stainless steel construction resists thermal cycling stress and corrosion—critical factors in high-heat environments where traditional steel valves degrade. The Race Flo designation indicates this valve is optimized for maximum flow efficiency, making it the choice for engine builders targeting improved breathing and power output on carbureted or fuel-injected Mopar platforms. Each valve is individually manufactured to Manley's exacting tolerances, ensuring consistent seat contact and seal integrity across the RPM band.

This intake valve is ideal for builders of street performance engines, race-ready stroker builds, and vintage muscle car restorations where factory valve flow characteristics fall short of modern expectations. Mopar B-block (318, 340, 360) and RB-block (383, 400, 440) engines benefit from improved airflow and extended component lifespan when upgraded to Manley-grade valvetrain components. Use in conjunction with compatible valve seats, guides, and spring assemblies to achieve reliable operation under boost, high compression, or sustained high-RPM cruising conditions.

Manley Performance is recognized within the engine-building community for precision and consistency across their intake and exhaust valve offerings. The 2.140-inch head size has become the upgrade standard for serious Mopar buildup applications, offering a balance between flow improvement and compatibility with modern cylinder head designs. This single intake valve ships ready to install; order in multiples of eight for a complete intake valve set on V8 engines.