MSD 8464 Distributor Bushing & Spring Set Mechanical Advance Tune Kit

The MSD 8464 Bushing and Spring Set is designed to allow precise tuning of the mechanical advance curve in MSD distributors. By swapping bushings and springs, engine builders and tuners can customize the rate and total amount of ignition advance to match the specific needs of their engine combination — optimizing power, throttle response, and engine health.

Key Features:

• Includes multiple advance bushings to limit and adjust total mechanical advance
• Includes assorted advance springs to control the rate at which advance comes in
• Allows fine-tuning of the advance curve without replacing the entire distributor
• Compatible with MSD Pro-Billet and many other MSD mechanical advance distributors
• Ideal for performance street, strip, and racing applications
• Simple installation with basic hand tools

Properly dialing in the mechanical advance curve is a critical step in any performance ignition tune-up. The MSD 8464 gives tuners the components needed to set the advance curve precisely, helping to prevent detonation on pump gas while maximizing power output across the RPM range.