MSD WAS10090 Distributor Housing Shim 0.500 in ID 1.000 in OD Steel

The MSD WAS10090 is a steel distributor housing shim designed as a precision replacement component for MSD distributors. Used during distributor assembly or rebuild, this shim ensures proper alignment and correct end-play tolerances within the distributor housing — critical factors for maintaining accurate ignition timing and long-term distributor performance.

Key Features:

• Inner Diameter: 0.500 in.
• Outer Diameter: 1.000 in.
• Material: Steel construction for durability and wear resistance
• Application: Designed specifically for MSD distributor assemblies
• Sold individually (each)

Whether rebuilding an existing MSD distributor or replacing a worn shim, the WAS10090 is an OEM-spec part that restores proper distributor housing clearance and helps maintain reliable, consistent spark timing. A small but critical component in any high-performance ignition system.