2.400 E/D BBC Intake Valve

The Manley 2.400 E/D BBC Intake Valve (MAN11582-1) is a severe-duty intake valve engineered for big block Chevy engines that demand uncompromising performance under extreme conditions. This single intake valve features a 2.400-inch head diameter and 0.342-inch valve stem, delivering the precise flow characteristics and structural integrity required for high-rpm, high-boost applications where factory components fall short. Stainless steel construction throughout the 6.600-inch length provides superior corrosion resistance and durability in demanding engine environments.

The E/D (Evolution/Duramax) designation indicates Manley's severe-duty classification—a specification tier reserved for engines operating at sustained high stress. The 2.400-inch head size optimizes flow volume while maintaining structural rigidity, critical for engines running elevated boost pressures or nitrous systems. Stainless steel material selection resists thermal cycling degradation and corrosion better than standard mild steel, extending valve life in engines subject to fuel additives, salt-air exposure, or chemically aggressive combustion environments. The 0.342-inch stem diameter provides the contact surface necessary for precision valve seat sealing at operating temperatures exceeding 700 degrees Fahrenheit.

This valve serves builders and operators rebuilding or upgrading big block Chevy engines for racing, high-performance street use, or commercial heavy-duty applications where stock valvetrain components cannot sustain continuous operation. Whether you're assembling a fuel-injected big block for competitive events, restoring a vintage musclecar to modern performance standards, or replacing worn components in a marine or industrial Chevy engine, this Manley intake valve delivers the mechanical reliability and thermal stability required for uninterrupted service. Each valve is sold individually—verify your engine's complete valvetrain requirements before ordering.