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Product Summary

Chevy Small Block V8, Chevy Big Block V8, Black, Black

  • The polished steel shaft is QPQ coated and guided by a sealed ball bearing for smooth operation at all rpms
  • A maintenance-free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range
  • Features a CNC machined billet aluminum housing and billet aluminum base
  • Comes with easy-to-adjust mechanical advance
  • Nylon pads ensure smooth operation of the advance weights

Key Specs

D-40-39
MFG. Part #85505
BrandMSD
Cap TypeHEI / Male
CARB EO#

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MSD 85505 Details

MSD Pro-Billet Distributors are the finest performance and racing distributors available. Every feature has been engineered to endure the rigors of high performance and racing engines. Whether cruising the streets or racing stock cars, dragsters, boats or trucks, MSD has a distributor for it. MSD uses state-of-the-art, Computer Numerical Controlled (CNC) mills and lathes to machine each housing.

After a long series of precise cuts and movements, the billet is formed into a flawless distributor housing that is accurate to within 0.001”. The flex-free housings are lightweight, have no porosity or weak areas and look great on polished, show quality engines.
Features:

  • Must be used with an MSD Ignition Control
  • Polished steel shaft is QPQ coated and guided by a sealed ball bearing for smooth operation at all rpms
  • Maintenance-free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range
  • CNC machined billet aluminum housing and billet aluminum base providing superior strength and great looks
  • Easy-to-adjust mechanical advance with supplied springs and stop bushings (except locked out versions)
  • Advance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reduction
  • Advance weight pins are staked and tig welded to the plate
  • Nylon pads ensure smooth operation of the advance weights
  • Mechanical advance assembly can be locked out for crank trigger systems or racing applications
  • Vacuum advance canister for improved economy (can be locked out)
  • Fits Chevy V8

Instructions (pdf)

Features

  • Must be used with an MSD Ignition Control
  • Polished steel shaft is QPQ coated and guided by a sealed ball bearing for smooth operation at all rpms
  • Maintenance-free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range
  • CNC machined billet aluminum housing and billet aluminum base providing superior strength and great looks
  • Easy-to-adjust mechanical advance with supplied springs and stop bushings (except locked out versions)
  • Advance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reduction
  • Advance weight pins are staked and tig welded to the plate
  • Nylon pads ensure smooth operation of the advance weights
  • Mechanical advance assembly can be locked out for crank trigger systems or racing applications
  • Vacuum advance canister for improved economy (can be locked out)

Application

All the performance of our Pro-Billet line NOW IN BLACK for your Ford, Chevy or Chrysler. Must be used with MSD 6, 7, or 8-series ignition.

MSD Pro-Billet Distributors are the finest performance and racing distributors available. Every feature has been engineered to endure the rigors of high performance and racing engines. Whether cruising the streets or racing stock cars, dragsters, boats or trucks, MSD has a distributor for it. MSD uses state-of-the-art, Computer Numerical Controlled (CNC) mills and lathes to machine each housing. After a long series of precise cuts and movements, the billet is formed into a flawless distributor housing that is accurate to within 0.001”. The flex-free housings are lightweight, have no porosity or weak areas and look great on polished, show quality engines. 

Installation Instructions

Charts

MSD 85505 Specifications

D-40-39
KEY SPECS
MFG. Part #85505
BrandMSD
Cap TypeHEI / Male
CARB EO#
GENERAL
External Ignition Box RequiredYes
Cap Terminal StyleHEI / Male
Advance TypeMechanical
Trigger StyleMagnetic
Hall EffectNo
Sync SignalNo
Trigger SensorsSingle
Gear MaterialBronze
Gear RotationStandard
Distributor Cap ColorBlack
Ignition Box RequiredYes
Mechanical Tach DriveNo
Slip CollarYes
Housing MaterialBillet Aluminum
Housing FinishBlack
EmissionsCalifornia EO Approved
Marine UseNo
Sold in QuantityEach
GTIN Code085132855056