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Holley EFI Dual Sync Distributor SBC/BBC
  • Holley EFI Dual Sync Distributor SBC/BBC

    SKU: HOL565200BK

    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 Black anodized 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 iron 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


    • 1955-1986 Chevrolet Gen 1 Small Block
    • 1973�1977 Buick Century
    • 1975�1979 Buick Skylark
    • 1978 Buick Lesabre
    • 1977-1980 Buick Regal
    • 1955-1981 Chevrolet Bel Air
    • 1955-1972 Chevrolet Townsman
    • 1955-1972 Chevrolet Nomad
    • 1958-1975 Chevrolet Biscayne
    • 1969-1986 Chevrolet Blazer
    • 1967-1986 Chevrolet Camaro
    • 1966-1986 Chevrolet Caprice
    • 1964-1977 Chevrolet Chevelle
    • 1963-1968 Chevrolet Chevy II
    • 1963-1968 Chevrolet Nova
    • 1957-1986 Chevrolet Corvette
    • 1958-1985 Chevrolet Impala
    • 1959-1986 Chevrolet El Camino
    • 1965-1986 Chevrolet C10/K10
    • 1965-1986 Chevrolet C20/K20
    • 1965-1986 Chevrolet C30/K30
    • 1960-1962 Chevrolet C40/K40
    • 1967-1986 Chevrolet G10
    • 1967-1986 Chevrolet G20
    • 1967-1986 Chevrolet G30
    • 1970-1986 Chevrolet Monte Carlo
    • 1975;1977-1979 Oldsmobile Custom Cruiser
    • 1975 Oldsmobile Delta 88
    • 1977-1979 Oldsmobile Omega
    • 1978-1980 Oldsmobile Cutlass
    • 1975;1983-1986 Pontiac Bonneville
    • 1975 Pontiac Catalina
    • 1975;1978-1980 Pontiac Grand AM
    • 1975-1976;1978-1980;1983-1986 Pontiac Grand-Prix
    • 1977-1986 Pontiac Firebird
    • 1977-1980 Pontiac Lemans
    • 1975;1977-1980 Pontiac Grand Lemans
    • 1977-1979 Pontiac Pheonix
    • 1977 Pontiac Ventura
    • 1977-1979 Pontiac Pheonix
    • 1983-1986 Pontiac Parisienne
    • 1978-1979 Pontiac Sunbird