- Made of a bronze/aluminum/nickel alloy (AMPCO 45) Must be used with MSD ignition. - Softer material will not damage the camshaft The 85827 Distributor comes with Bronze Gear 8583 already installed and is designed for camshafts requiring a bronze distributor gear: - Used with billet steel cams - Should be changed more frequently than other gear materials The steel shaft that spins the advance and reluctor receives a friction-reducing coating and is guided by a sealed ball bearing and long sintered bushing. This combination provides stable timing signals and spark delivery at any rpm. Triggering chores are handled by MSD's race-proven, maintenance-free magnetic pick-up. MSD premium distributors come complete with a race rotor and alkyd cap. For Ford enthusiasts that are serious about performance! Just under the brass terminals of the MSD cap and rotor is an easy-to-adjust mechanical advance assembly. The assembly is fine blanked from Chromoly Steel, TIG-welded for strength plus receives a QPQ coating. The precision weights glide on nylon bushings for smooth advancement and different springs and stop bushings are supplied so a variety of advance curves can be tuned. The adjustable mechanical advance assembly allows you to accurately and easily modify the advance curve to match your specific application.