This MSD Flying Magnet crank trigger kit pairs a Hall-Effect sensor with a billet aluminum trigger wheel to deliver the most accurate way to trigger EFI on Ford small block Windsor engines (289/302/351W). Rigid aluminum mounting bracketry and hardware keep the assembly from flexing, preventing timing fluctuation.
Specifications:
- Fitment: Ford SBF Windsor, 289/302/351W
- Diameter: 6.562 in.
- Color: Red
- Sensor Type: Hall Effect
- Operating Voltage: 5-20V
- Sensor Dimensions: 3/4 x 2 in.
- Wheel Width: 3/8 in.
- Warranty: Manufacturer's Limited 1 Year Warranty
- Part Number: 86401
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 86401 crank trigger kit fit?
It's designed for Ford small block Windsor engines, 289/302/351W.
What sensor does this kit use?
A 3-wire Hall-Effect sensor that's less susceptible to noise interference than magnetic sensors.
Why choose a Hall-Effect crank trigger kit?
It's the most accurate way to trigger EFI, sending a clean signal for every firing.
Is the MSD 86401 legal for street use?
No. It is coded for Racing Use Only and cannot be installed on an emissions-controlled street vehicle.

