Crank Trigger Kit Flying Magnet Hall-Effect LS Gen Iii/Iv 7.25 In. Small Block Chevrolet Gen Iii/Iv Adjustable Timing Pointer Red MSD IgnitionUpgrading to an MSD Flying Magnet Crank Trigger Kit will deliver the precise and reliable signal that a high performance engine requires. This kit gives you the ability to control timing electronically through a Holley EFI ECU (or other standalone engine management system ignition controller). At the heart of the kit is the 3 wire Hall Effect Sensor that is easier to set up, less susceptible to EMI RFI interference noise, and less likely to have false