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Holley EFI Crank Trigger Kits 556-172 Triggers, EFI, 6.56 in. Diameter, Aluminum, Silver, Adjustable Bracket, Black, 3-wire Pickup, 12-1X, Hall Effect, Ford, Small Block, Kit

SKU: HLY556-172

Crank Trigger Kits

Holley EFI Crank Trigger Kits 556-172 Triggers, EFI, 6.56 in. Diameter, Aluminum, Silver, Adjustable Bracket, Black, 3-wire Pickup, 12-1X, Hall Effect, Ford, Small Block, Kit

SKU: HLY556-172

Crank Trigger Kits
A$1,420.39
BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.
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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

Crank Trigger Kits

Data: v4.2 - Upd: 2026-10-13 18:48:02

Specifications

Product Attributes - Brand
Holley
Product Attributes - Manufacturer's Part Number
556-172
Product Attributes - Part Type
Crank Trigger Kits
Product Attributes - Product Line
Holley EFI Crank Trigger Kits
Product Attributes - UPC
090127470671
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 hly556-172
SFX Item ID 4782630
Supplier Item Code 4782630
Manufacturer SKU 556-172
Manufacturer UPC N/A
Alternative References HOL556-172, 3-wire, 12-1X

Compatibility

Application Data
  • UniversalNo
    MakeFORD
    Beginning Year1962
    Ending Year1963
    Engine Size3.6L/221
    Engine FamilyFord small block Windsor
    Engine TypeV8
    Harmonic Damper Diameter (in.)6.562
  • UniversalNo
    MakeFORD
    Beginning Year1962
    Ending Year1965
    Engine Size4.3L/260
    Engine FamilyFord small block Windsor
    Engine TypeV8
    Harmonic Damper Diameter (in.)6.562
  • UniversalNo
    MakeFORD
    Beginning Year1963
    Ending Year1969
    Engine Size4.7L/289
    Engine FamilyFord small block Windsor
    Engine TypeV8
    Harmonic Damper Diameter (in.)6.562
  • UniversalNo
    MakeFORD
    Beginning Year1968
    Ending Year2001
    Engine Size5.0L/302
    Engine FamilyFord small block Windsor
    Engine TypeV8
    Harmonic Damper Diameter (in.)6.562
  • UniversalNo
    MakeFORD
    Beginning Year1969
    Ending Year1997
    Engine Size5.8L/351
    Engine FamilyFord small block Windsor
    Engine TypeV8
    Harmonic Damper Diameter (in.)6.562
  • UniversalNo
    MakeFORD
    Beginning Year1980
    Ending Year1982
    Engine Size4.2L/255
    Engine FamilyFord small block Windsor
    Engine TypeV8
    Harmonic Damper Diameter (in.)6.562

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