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Holley EFI Crank Trigger Kits 556-170 Triggers, EFI, 8 in. Diameter, Aluminum, Silver, Adjustable Bracket, Black, 3-wire Pickup, M12 x 1.0mm Thread, Chevy, 6.5-7.4L, Kit

SKU: HLY556-170

Crank Trigger Kits

Holley EFI Crank Trigger Kits 556-170 Triggers, EFI, 8 in. Diameter, Aluminum, Silver, Adjustable Bracket, Black, 3-wire Pickup, M12 x 1.0mm Thread, Chevy, 6.5-7.4L, Kit

SKU: HLY556-170

Crank Trigger Kits
A$1,374.97
LOW STOCK! Est Ship 4-7 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.
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Description

Holley's EFI crank trigger kits provide accurate crank speed and position signals to Holley EFI systems in the most demanding, high-horsepower, racing applications. The crank position is measured every 10 degrees instead of every 45 degrees, like standard 4-magnet crank trigger systems. Holley's EFI crank trigger kits feature 1/4 in. thick, billet steel, 36-1 or 60-2 tooth-crank trigger wheels with black zinc oxide finish for superior corrosion resistance and striking good looks

Other notable features include:

* Crank wheels center off of balancer hubs, eliminating the need for centering rings
* All billet, 6061-T6 aluminum sensor mounting brackets with "bright-dipped" black anodized finish and laser-etched Holley EFI logo
* Custom 3-wire, ferrous-target, Hall-effect sensors with M12 x 1.0mm threads for finer gap adjustment
* Grade 8 and mil-spec mounting hardware

Part Type

8IN 12-1X Crank Trigger Kit BBC Hall Effect

Data: v4.2 - Upd: 2026-10-14 02:09:58

Specifications

Product Attributes - Brand
Holley
Product Attributes - Manufacturer's Part Number
556-170
Product Attributes - Part Type
Crank Trigger Kits
Product Attributes - Product Line
Holley EFI Crank Trigger Kits
Product Attributes - UPC
090127470640
Product Attributes - Pickup Included
Yes
Product Attributes - Adjustable Mounting Bracket Included
Yes
Product Attributes - Bracket Material
Aluminum
Product Attributes - Bracket Color
Black
Product Attributes - Crank Trigger Wheel Included
Yes
Product Attributes - Crankshaft Wheel Material
Aluminum
Product Attributes - Crankshaft Wheel Color
Natural
Product Attributes - Hardware Included
Yes
Product Attributes - Quantity
Sold as a kit.

Reference Information

Brand Name/s Holley
StreetFX SKU hly556-170
SFX Item ID 4783302
Supplier Item Code 4783302
Manufacturer SKU 556-170
Manufacturer UPC 90127470640
Alternative References HOL556-170, 3-wire, M12, 1.0mm, 6.5-7.4L

Compatibility

Application Data
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1965
    Ending Year1970
    Engine Size6.5L/396
    Engine FamilyChevy big block Mark IV
    Engine TypeV8
    Harmonic Damper Diameter (in.)7.250
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1966
    Ending Year1969
    Engine Size7.0L/427
    Engine FamilyChevy big block Mark IV
    Engine TypeV8
    Harmonic Damper Diameter (in.)7.250
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1970
    Ending Year1972
    Engine Size6.6L/402
    Engine FamilyChevy big block Mark IV
    Engine TypeV8
    Harmonic Damper Diameter (in.)7.250
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1970
    Ending Year1990
    Engine Size7.4L/454
    Engine FamilyChevy big block Mark IV
    Engine TypeV8
    Harmonic Damper Diameter (in.)7.250
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1991
    Ending Year1995
    Engine Size7.4L/454
    Engine FamilyChevy small block Gen V
    Engine TypeV8
    Harmonic Damper Diameter (in.)7.250
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1996
    Ending Year2000
    Engine Size7.4L/454
    Engine FamilyChevy big block Gen VI
    Engine TypeV8
    Harmonic Damper Diameter (in.)7.250

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