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Product Summary

HEI / Male Cap Type, HEI / Male Cap Terminal Style

    Rebates Available

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    Key Specs

    MFG. Part #565-210BK
    BrandHolley
    Cap TypeHEI / Male
    Advance TypeElectronic
    See more specs

    Need To Know

    Quick and Easy Returns

    Return Policy

    Holley 565-210BK Details

    Introducing the next generation of Holley EFI Dual Sync Distributors, the new design features an improved shutter wheel, high-quality dual Hall Effect sensors, and an MSD cap and rotor!While these distributors are designed to be used primarily in sequentially injected installations, you can easily use them as a crank trigger for TBI system also. The precision machined shutter wheel design ensures accurate timing, even at very high engine speeds. The Gen 2 Dual Sync also included a QPQ coated shutter wheel for superior corrosion resistance, and the wheel has been pinned and welded to the shaft for increased reliability. These distributors can also be used with other EFI systems that support Hall Effect crank and cam sensor inputs. Do you need to a bronze gear for your billet cam? No problem, these distributors maintain MSD shaft diameters, making it easy to source a bronze gear!
    • Plug and Play with Holley EFI and Sniper EFI with adapter harness part number 558-493
    • Includes both crank and cam sensors to support sequential EFI operation
    • Hall Effect sensor design provides precise timing control and noise immunity
    • Black anodized CNC machined billet aluminum housing provides superior strength and great looks
    • Integrated LEDs allow for easy setup
    • Available for popular applications
    • Comes with hardened steel distributor gear
    • Precision machined shutter wheel designed for improved accuracy at extreme engine RPM
    • Shutter wheel is pinned and welded to distributor shaft for superior reliability
    • Blank cap available for Coil-On-Plug applications

    Charts

    Rebates

    Holley IRS Sale 2026

    Save 10% instantly on select products across the Holley family of performance brands during the annual Holley I.R.S.Tax Sale. Instant rebate period has been extended and now runs from February 17, 2026 through April 19, 2026.

    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.

    Holley 565-210BK Specifications

    KEY SPECS
    MFG. Part #565-210BK
    BrandHolley
    Cap TypeHEI / Male
    Advance TypeElectronic
    GENERAL
    Cap Terminal StyleHEI / Male
    Trigger StyleHall Effect
    Hall EffectYes
    Computer Controlled CompatibleYes
    Gear MaterialSteel
    Gear RotationStandard
    Distributor Cap ColorBlack
    Ignition Box RequiredNo
    Mechanical Tach DriveNo
    Slip CollarNo
    Housing MaterialBillet Aluminum
    Housing FinishBlack
    Rotor RotationStandard
    Marine UseNo
    Coil IncludedNo
    Sold in QuantityEach
    NotesFor Holley EFI systems. Possibly compatible with systems using Hall effect sensors. Can be used with Sniper EFI, ignition adapter 558-493 is required.
    GTIN Code090127042229
    Ignition Box IncludedNo
    Wiring Harness IncludedNo

    Fitment

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