Replacement Shaft for 8558 Distributor

The Replacement Shaft for 8558 Distributor (MSD ASY15667) is a precision-engineered OEM-quality component specifically designed for rebuilding or repairing the MSD 8558 high-performance distributor. This product is tailored for automotive enthusiasts and professional mechanics who require reliable ignition timing control in race-prepped engines and high-performance applications.

This replacement shaft restores critical ignition timing by ensuring the rotor maintains accurate positioning across the full RPM range without drift or mechanical slack. Engineered to tight tolerances, it maintains proper rotor-to-cap alignment, which is essential for consistent spark delivery in high-output ignition systems. The design accommodates the 8558's internal gear drive and bushing geometry, allowing for smooth operation without binding.

This replacement shaft is particularly beneficial for mechanics performing routine maintenance on high-mileage performance vehicles and for those restoring MSD 8558 distributors. Weighing just 0.61 lbs, it integrates seamlessly into your existing distributor housing, ensuring minimal runout and concentricity for optimal performance.