MSD 85555 Chevy Black V8 Pro-Billet Distributor

This is our most popular performance distributor! The housing is machined from a billet of 6061-T6 aluminum on a state-of-the-art CNC machine producing exact tolerances. For high rpm stability, a .500” steel shaft is supported by a sealed ball bearing and a long sintered bushing. This shaft also receives a QPQ coating for friction reduction and resistance to corrosion. A precision machined reluctor is attached to the shaft which triggers the magnetic pick-up mounted in the housing. This high output magnetic pick-up is the most accurate way to trigger your ignition. Plus, with no moving parts to wear or adjust, the pick-up is maintenancefree! Just above the pick-up is MSD’s adjustable mechanical advance assembly. Different springs and stop bushings are supplied so you can tune an advance curve to match your application.

CNC machined billet aluminum housing and billet aluminum base

Easy-to-adjust mechanical advance with supplied springs and stop bushings

Maintenance-free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range

Polished steel shaft is QPQ coated and guided by a sealed ball bearing and extra long sintered bushing

Advance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reduction

Mechanical advance assembly can be locked out for crank trigger systems

Advance weight pins are staked and tig welded to the plate

Nylon pads ensure smooth operation of the advance weights

Special oil tract improves lubrication to the distributor and cam gear

O-ring seals can be added to modified blocks to improve oil pressure control

Supplied with an HEI style distributor cap and rotor (accepts Cap-A-Dapts)

Must be used with an MSD Ignition Control

Will not accept a vacuum advance canister

No CARB Exemption Order Number