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Product Summary

Chevy Small Block V8, Chevy Big Block V8, Black

    Key Specs

    D-40-39
    MFG. Part #85703
    BrandMSD
    Cap TypeHEI / Male
    CARB EO#

    Need To Know

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    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 SBC V8

    Charts

    Specifications

    D-40-39
    KEY SPECS
    MFG. Part #85703
    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 MaterialIron
    Gear RotationStandard
    Distributor Cap ColorBlack
    Ignition Box RequiredYes
    Mechanical Tach DriveNo
    Slip CollarYes
    Housing MaterialBillet Aluminum
    Housing FinishBlack Anodized
    EmissionsCalifornia EO Approved
    Marine UseNo
    Sold in QuantityEach
    NotesSmall base diameter for clearing tunnel rams, blowers, and tight clearance firewalls.
    GTIN Code085132857036