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Product Summary

351C, 351M, 351W, 396, 400, HEI / Male Cap Type

    Key Specs

    MFG. Part #8580
    BrandMSD
    Cap TypeHEI / Male
    Advance TypeMechanical

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    MSD 8580 Details

    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 chro-moly 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 steel shaft that spins the advance and reluctor receives a friction reducing coating plus 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 MSDs race proven, maintenance-free magnetic pick-up.
    • CNC machined billet aluminum housing and Dupont Rynite 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
    • 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
    • Must be used with an MSD Ignition Control
    • Supplied with Cap-A-Dapt and rotor (accepts MSD socket style caps)
    • No CARB Exemption Order Number
    • Must be used with an MSD Ignition Control
    • Fits 351C, 351M, 400, 429, 460
    • Will not clear some factory-style Shaker Hood Scoops.

    Charts

    CARB Warning

    For race/ off road use or for use on pre-1966 vehicles.

    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, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. 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 8580 Specifications

    KEY SPECS
    MFG. Part #8580
    BrandMSD
    Cap TypeHEI / Male
    Advance TypeMechanical
    GENERAL
    External Ignition Box RequiredYes
    Cap Terminal StyleHEI / Male
    Trigger StyleMagnetic
    Hall EffectNo
    Sync SignalNo
    Trigger SensorsSingle
    Gear MaterialIron
    Gear RotationStandard
    Ignition Box RequiredYes
    Mechanical Tach DriveNo
    Slip CollarNo
    Housing MaterialBillet Aluminum
    Housing FinishNatural
    Marine UseNo
    Sold in QuantityEach
    GTIN Code085132085804