S/D 2.350 Intake Valves - +.350

The Manley S/D 2.350 Intake Valves (+.350) represent severe-duty performance engineering for big-block Chevy applications. Built to withstand extreme cylinder pressures and extended high-RPM operation, this set of eight stainless steel intake valves delivers the thermal stability and durability demanded in street performance, bracket racing, and engine rebuild applications where reliability cannot be compromised.

Each valve features a 2.350-inch head diameter paired with a 0.342-inch valve stem and measures 5.610 inches in overall length. The stainless steel construction resists thermal cycling fatigue and corrosion from fuel and combustion byproducts, critical factors in engines pushed to their limits. The +.350 oversized designation indicates these valves are machined to accommodate larger-diameter seats, enabling flow optimization for high-performance porting work. This specification matters because it allows engine builders to increase intake charge velocity and volumetric efficiency without sacrificing valve seat integrity under sustained load.

This valve set serves engine builders, performance shops, and enthusiasts rebuilding or modifying big-block Chevy powerplants for competition or high-output street use. Manley's severe-duty classification indicates these valves have been tested under conditions that exceed normal operating parameters—extended WOT runs, elevated boost pressures, and sustained high RPM—making them the choice for applications where stock or marginal components would fail. The eight-piece set covers the complete intake valve requirement for a big-block engine.

Manley has established itself as a precision valve manufacturer trusted in motorsports and engine building. For builders specifying components for maximum reliability and flow, Manley severe-duty intake valves represent a verified investment in engine longevity and consistent performance under extreme conditions.