7.25 12-1X Crank Trigger Kit GM LS Hall Effect

The Holley 556-175 Crank Trigger Kit provides a precise and reliable signal for high-performance engines, crucial for accurate spark timing and electronic fuel injection (EFI) control. It's designed to be used with Holley EFI ECUs or other standalone engine management systems/ignition controllers. The kit features a 3-wire Hall-Effect Sensor, which is less susceptible to EMI/RFI interference and false signals compared to distributors and VR magnetic sensors. It also boasts a robust design with no wear parts, reducing the likelihood of mechanical failure. Installation is made easy with included instructions covering mechanical setup and Holley EFI Software Setup.