Manley 42355-8 5/16" Small Block Chevy Guide Plates

The Manley 42355-8 valve guide plates are precision-machined components designed for small block Chevrolet engines. These guide plates are engineered to provide accurate valve train geometry and eliminate pushrod flex under high-RPM operation.

Key Features:

• 5/16" pushrod hole diameter for standard small block Chevy applications
• CNC-machined from high-quality steel for precision and durability
• Ensures proper rocker arm alignment and reduces side loading on valve stems
• Essential upgrade for high-performance street and racing engines
• Compatible with aftermarket cylinder heads and rocker arm systems

Guide plates are critical for maintaining proper valve train geometry, especially in engines using guideplates-style rocker arms or stud-mounted rocker systems. These Manley guide plates help prevent premature wear on pushrods, rocker arms, and valve guides while improving valve train stability at higher engine speeds.