MSD Bronze Distributor gear for MSD 8563 Pontiac Distributor, .500"

MSD Bronze Distributor gears are machined from quality AMPCO 45 aluminum bronze containing 5% nickel. This special com­bination creates high-strength gear teeth that are less prone to wear even with high-volume oil pumps. Increased outer hardened layer thickness (RC 55-60). Micro polished surface for smooth contact. Proprietary formulated ductile iron. Melonite QPQ coated reduces friction and initial wear. Interstitial carbide concentration improves wear resistance and