SBC R/M 1.940in Intake Valve

The MANLEY SBC R/M 1.940in Intake Valve (part number 11860-1) is a precision-engineered intake valve designed for small block Chevy high-performance and racing engine builds. This stainless steel intake valve features a 1.940-inch head diameter and 0.342-inch valve stem, optimized for maximum flow characteristics in competition and street performance applications where engine reliability and sustained power delivery are non-negotiable.

Measuring 4.951 inches in overall length, this Race Master intake valve is manufactured from stainless steel for superior corrosion resistance and heat tolerance—critical properties in high-RPM environments where thermal cycling and combustion pressures test material integrity continuously. The 1.940-inch head diameter is a proven size for small block Chevy applications, balancing intake runner velocity with valve seat sealing reliability. MANLEY's manufacturing tolerances ensure proper fit within your cylinder head and compatible seat geometry, eliminating the valve recession and guide wear that compromise less rigorous production standards.

This valve is purpose-built for operators restoring or upgrading small block Chevy engines in street rods, race platforms, marine builds, and performance restorations. Whether you're assembling a crate motor replacement, rebuilding a vintage engine block, or maximizing flow in a competition head, intake valve selection directly impacts combustion efficiency, horsepower consistency, and long-term engine durability. MANLEY's Race Master lineup is chosen by engine builders who cannot tolerate valve failure or performance degradation under sustained load.

Sold individually, this valve pairs with compatible exhaust valves and cylinder head ports to complete a full valve train assembly. Verify your cylinder head's seat angle and intake port specifications before ordering to ensure proper seating and sealing geometry.