SBC R/F 1.940in Intake Valve

The MANLEY SBC R/F 1.940in Intake Valve (MAN11522-1) is a race-proven intake valve engineered for small block Chevy engine builds requiring precision fuel delivery and maximum flow characteristics. This single intake valve features a 1.940-inch head diameter with a 0.342-inch valve stem, designed to optimize combustion efficiency in high-performance applications where stock valvetrain components no longer meet power requirements.

Manufactured from stainless steel construction, this Race Flo intake valve delivers superior corrosion resistance and durability under sustained high-RPM operation. At 4.911 inches in overall length, the valve integrates seamlessly into small block Chevy cylinder heads designed for standard intake valve geometry. The stainless material provides dimensional stability across thermal cycling, critical for maintaining precise valve-seat contact and preventing leakage that degrades cylinder pressure and power output.

This valve suits engine builders and performance enthusiasts restoring small block Chevy engines for street performance, bracket racing, or dyno testing. MANLEY intake valves are specified in applications where OEM components cannot sustain the heat and stress of elevated boost levels or extended RPM operation. The 1.940-inch head size represents the optimal balance between flow capacity and structural integrity for small block displacement, making this valve a direct replacement for worn or undersized original equipment.

Sold as a single valve, this component must be paired with a matching exhaust valve and appropriate spring assemblies to complete a valve job. Installation requires professional machine work and cylinder head porting to match valve seat angles and valve guide dimensions specific to your head casting.