5/16in Lash Caps

The MANLEY 5/16in Lash Caps are precision valve train components engineered for serious engine builders and high-performance automotive technicians. These steel lash caps are essential for adjusting valve clearance in applications requiring exact rocker arm geometry and proper valve lash settings. Used in street, race, and rebuilding scenarios, they enable mechanics to fine-tune engine performance and maintain optimal combustion efficiency without compromising valvetrain integrity.

Each cap measures 5/16 inch in diameter and features a 0.080 inch thickness, designed to work with valve stems of matching size and a minimum tip dimension of 0.250 inch. Manufactured from hardened steel in natural finish, these caps provide durability and dimensional consistency across multiple installation cycles. The set of 8 delivers the quantity needed for typical small-block and mid-size engine projects, allowing for replacement, backup, or mixed-application builds without additional ordering.

Engine rebuilders, performance shops, and DIY enthusiasts benefit most from these lash caps when restoring older engines, upgrading valve systems, or establishing precise lash settings for flat-tappet and roller cam applications. Installation requires removing the rocker arm and sliding the cap onto the valve stem tip before reassembly—a straightforward process that ensures correct valve timing and reduces noise. Compatibility depends on matching stem diameter and tip geometry; verify your engine's valve specifications before purchase to ensure proper fit and function.