Replacement Shim

The Replacement Shim is a critical component for precision engine timing and ignition system maintenance. Designed specifically for MSD distributors, this shim allows technicians and performance enthusiasts to set the correct end play within the distributor housing. Proper spacing prevents excessive vertical movement of the distributor shaft, ensuring consistent ignition timing and reducing premature wear on internal components. This essential hardware ensures that your ignition system remains reliable during high-RPM operation and demanding driving conditions.

This Replacement Shim is manufactured from high-quality brass, providing a durable yet low-friction surface suitable for high-speed rotational environments. It features a precise 0.500-inch inner diameter and a 1.000-inch outer diameter, allowing it to fit securely around the distributor shaft. The thin-profile design enables fine adjustments to the distributor’s mechanical tolerances, which is essential for maintaining optimal engine performance under heavy loads. By utilizing brass construction, the shim offers excellent resistance to heat and corrosion within the engine bay.

Whether you are performing a routine rebuild or looking to buy parts for a racing ignition system, the Replacement Shim is the standard solution for eliminating excessive clearances. This individual component is a direct replacement for worn or damaged shims in various MSD distributor models. Reviewing your distributor's specifications and using these brass shims during installation helps protect the gear and camshaft from unnecessary stress. Maintaining the correct distributor end play is vital for anyone seeking peak mechanical efficiency and long-term durability.