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Camshaft / Crankshaft Sensor Flying Magnet Sensor

Cam Sync, Camshaft Sensor; Hall Effect; M12x1; For use with Flying Magnet Target

PART# 554-125

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$127.00   Suggested Retail
$102.56   Holleydays Price
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Holley EFI Cam Sync Signal is designed to generate a cam sync input signal to the ECU when used in flying magnet cam trigger setups. This sensor is a Hall Effect sensor, meaning it outputs a square wave signal, which is ideal for use with most electronic fuel injection systems.


  • 3 wire hall-effect camshaft sensor, generates digital square-wave signal
  • For use with flying magnet targets only – South pole of magnet facing sensor
  • Can operate from 8-20 volts; mating connector included
  • M12x1 threads for finer gap adjustability; Approx. 1.5” length


BrandHolley EFI
Emission Code5
Product TypeCam Sync - Magnetic - trigger- pickup
Sensor TypeHall Effect
Part Number554-125



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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This sensor is to only be used with a "flying magnet" target like Holley P/N 554-126. The internal Hall switch triggers from the South Pole of a magnet. It will not detect a ferrous metal target.
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