The AutoMeter Stack magnetic RPM sensor is a Stack Data Acquisition Series pickup with a 5/16"-24 x 1.5 thread and includes the magnet. Designed for tach and data-logging systems, the magnetic sensor provides a clean engine-speed signal for racing and logging applications. It installs into compatible sensor ports and pairs with Stack instrumentation to deliver accurate RPM readings for performance monitoring and tuning.
Autometer Stack Instruments Magnetic RPM Sensor 5/16in - 24 X 1.5in (Includes Magnet)