MSD Distributor Drive Gear P/N:8581

Keep your distributor spinning true with the MSD Distributor Drive Gear 8581, a bronze gear that meshes with the camshaft gear to drive the distributor shaft. It's a direct-fit replacement for a long list of classic Ford applications, including the 1970-1973 Ford Mustang, 1968-1979 Ford Thunderbird, 1970-1976 Ford Torino, 1978-1981 Ford Bronco, 1973-1996 Ford F-250 and 1973-1997 Ford F-350 — see the Buyer's Guide tab for the full list of 29 applications.

MSD bronze distributor gears are machined from quality AMPCO 45 aluminum bronze containing 5% nickel. This combination of bronze and nickel creates high-strength gear teeth that are less prone to wear even when paired with high-volume oil pumps.

• Bronze construction: machined from AMPCO 45 aluminum bronze with 5% nickel for high-strength gear teeth.
• Wear resistance: built to resist wear even with high-volume oil pumps.
• 0.530 in. ID: sized to fit the distributor shaft.

Signs the drive gear may need replacing include worn or chipped gear teeth and unstable ignition timing. If a worn gear is the cause of your timing scatter or hard starting, this replaces it.