This MSD Flying Magnet crank trigger kit uses a 3-wire Hall-Effect sensor to deliver a precise, EMI-resistant timing signal for GM Gen III/IV (LS) engines, letting the ignition timing be controlled electronically through an EFI ECU or standalone ignition controller. The kit includes a rigid billet mounting bracket and a degreed timing pointer for precise indexing, and is designed to pair with an ATI harmonic balancer (917302, 918852, 917264, or 917242) or a Meziere WP333 water pump on LSX blocks.
Specifications:
- Engine: GM Gen III/IV (LS)
- Diameter: 8 in.
- Color: Red
- Sensor Type: Hall Effect
- Operating Voltage: 5-20V
- Warranty: Manufacturer's Limited 1 Year Warranty
- Part Number: 8623-MSD
On some vehicles, this kit may require slight modifications to accommodate special engine plates, pulley systems, etc.
Compliance: This part is legal for sale and use on Racing Use Only Vehicles — competition vehicles that are not registered and never operated on the street. It is against the law to install this part on an Emissions Controlled Vehicle (1966-and-newer California-certified or 1968-and-newer federally certified vehicles).
FAQ
What engines does the MSD 8623-MSD kit fit?
It's designed for GM Gen III/IV (LS) engines.
What sensor does this kit use?
A 3-wire Hall-Effect sensor, which is easier to set up and less susceptible to EMI/RFI interference than magnetic sensors.
What harmonic balancer does this kit require?
It's designed to be used with the ATI Harmonic Balancer 917302 or 918852, and is also compatible with 917264 and 917242.
Is the MSD 8623-MSD legal for street use?
No. It is coded for Racing Use Only and cannot be installed on an emissions-controlled street vehicle.
