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Product Summary

351W, External Ignition Box Required, Black, Black

    Key Specs

    MFG. Part #857831
    BrandMSD
    Cap TypeHEI / Male
    Advance TypeMechanical

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    MSD 857831 Details

    MSD now offers Ford distributors with steel gears for use with hydraulic roller cams. In the world of modern engine design, it's hard to beat a hydraulic roller camshaft for all-around performance. It's crucial to match the distributor gear with the cam material to prevent premature failure of the cam or distributor gear which can lead to engine damage. Ford distributors present a challenge when changing the distributor gear due to their pressed fit, the need to cross drill the distributor shaft and set the gear to a specific height. We've taken the trouble out of the mix with our line of popular Ford distributor applications that come with a steel gear installed ready for hydraulic roller cams. Whether you're working with a crate engine or building your own combination, MSD has the performance distributor ready.

    • CNC Machined Billet Aluminum Housing and Billet Aluminum Base
    • Steel Gear Installed
    • Polished steel shaft is QPQ coated and guided by a sealed ball bearing
    • 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
    • Easy-to-adjust mechanical advance with supplied springs and stop bushings
    • Nylon pads ensure smooth operation of the advance weights
    • Mechanical advance assembly can be locked out for crank trigger systems
    • Maintenance-free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range

    Charts

    CARB Warning

    For race/ off road use only

    Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

    MSD 857831 Specifications

    KEY SPECS
    MFG. Part #857831
    BrandMSD
    Cap TypeHEI / Male
    Advance TypeMechanical
    GENERAL
    Speedway Motors Catalog Part #547-857831
    External Ignition Box RequiredYes
    Cap Terminal StyleHEI / Male
    Trigger StyleMagnetic
    Gear MaterialSteel
    Distributor Cap ColorBlack
    Housing MaterialBillet Aluminum
    Housing FinishBlack
    Sold in QuantityEach
    NotesRequires the use of MSD 6, 7, 8 Series Ignition.
    GTIN Code090127064412