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Holley EFI Crank Trigger Kits 556-174 Triggers, 12-1X LS, Hall Effect, 8 in. Diameter, Aluminum, Silver, Adjustable Bracket, Black, 3-wire Pickup, Gen III, IV, LS, Kit

SKU: HLY556-174

Crank Trigger Kits

Holley EFI Crank Trigger Kits 556-174 Triggers, 12-1X LS, Hall Effect, 8 in. Diameter, Aluminum, Silver, Adjustable Bracket, Black, 3-wire Pickup, Gen III, IV, LS, Kit

SKU: HLY556-174

Crank Trigger Kits
A$1,374.97
IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or 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 GM LS Hall Effect

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

Specifications

Product Attributes - Brand
Holley
Product Attributes - Manufacturer's Part Number
556-174
Product Attributes - Part Type
Crank Trigger Kits
Product Attributes - Product Line
Holley EFI Crank Trigger Kits
Product Attributes - UPC
090127470695
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 hly556-174
SFX Item ID 4783745
Supplier Item Code 4783745
Manufacturer SKU 556-174
Manufacturer UPC 90127470695
Alternative References HOL556-174, 12-1X, 3-wire

Compatibility

Application Data
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1997
    Ending Year2007
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine TypeV8
    Harmonic Damper Diameter (in.)8.000
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2017
    Engine Size4.8L/294
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine TypeV8
    Harmonic Damper Diameter (in.)8.000
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2018
    Engine Size5.3L/325
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine TypeV8
    Harmonic Damper Diameter (in.)8.000
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2018
    Engine Size6.0L/364
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine TypeV8
    Harmonic Damper Diameter (in.)8.000
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2006
    Ending Year2015
    Engine Size7.0L/427
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine TypeV8
    Harmonic Damper Diameter (in.)8.000
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2008
    Ending Year2018
    Engine Size6.2L/376
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine TypeV8
    Harmonic Damper Diameter (in.)8.000

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