Camshaft Sensor w/Flying Magnet Target 12mmx1

The Camshaft Sensor w/Flying Magnet Target 12mmx1 from Holley is a precision engine management component designed for builders and tuners integrating modern EFI systems into both stock and heavily modified powerplants. This cam position sensor reads the exact rotational position of the camshaft, allowing your engine control unit to synchronize fuel injection and ignition timing with absolute accuracy. Whether you're upgrading a carbureted classic to fuel injection or fine-tuning a performance build, this sensor is essential for reliable cold starts, smooth idle quality, and consistent power delivery across the RPM range.

The flying magnet target design eliminates the need for a separate reluctor ring machined into the camshaft, making installation straightforward on both original equipment and custom builds. The 12mm x 1.0 thread pattern provides a secure, standardized mount point that integrates seamlessly with Holley EFI kits and compatible aftermarket fuel injection harnesses. By detecting the magnetic field of the target magnet as it rotates, the sensor generates a clean digital signal that the ECU uses to determine cam phase timing, enabling precise sequential fuel injection and optimized spark advance—critical for maximizing horsepower while maintaining drivability and emissions compliance.

Mechanics and performance enthusiasts favor this sensor for retrofit EFI conversions, LS swaps, and carburetor-to-injection upgrades where OEM sensors may not fit or communicate with aftermarket ECUs. Its compact footprint (3.4 x 3.3 x 6.7 inches) allows flexible placement in tight engine bays, and the lightweight construction (0.3 lbs) means zero impact on rotating assembly balance. Compatible with all Holley Terminator and HP EFI systems, this sensor delivers the signal integrity required for consistent closed-loop fueling and adaptive learning, ensuring your custom engine runs as reliably as it performs.