Lash Caps - 5.5mm

The Lash Caps - 5.5mm by MANLEY are precision valve lash adjustment components designed for serious engine builders and performance mechanics. These steel caps sit atop valve stems to maintain critical clearance specifications between valve train components. Used in high-performance and competition engines, lash caps are essential for proper valve operation, preventing excessive noise and ensuring optimal engine efficiency and longevity.

Manufactured from durable steel in a natural finish, each cap measures 5.5mm in diameter and features a 0.040-inch wall thickness for reliable durability under valve train stress. The set includes eight caps with a minimum tip dimension of 0.095 inches, engineered to fit 5.5mm valve stems with precision tolerances. This thickness specification ensures proper load distribution and thermal stability, critical factors in maintaining accurate lash measurements across engine operating temperatures and RPM ranges.

MANLEY lash caps are ideal for builders working with small-block and big-block engines requiring metric valve stem sizing. Installation is straightforward—caps simply place over the valve stem tip, allowing for precise shim-under-bucket or solid lifter adjustments without damage to the stem. This eight-piece set provides coverage for a complete cylinder head, making it an economical choice for both single-engine projects and professional machine shops performing frequent valve lash inspections and adjustments.