MSD designed this 8640 Crank Trigger Ignition for Small Block Ford 289/302 and 351 Windsor engines. Four magnets secured in the aluminum trigger wheel pass by a stationary non-magnetic pick-up to trigger the ignition. This "flying magnet" design produces accurate trigger signals and the non-magnetic pick-up cannot be falsely triggered. This system will trigger MSD 6, 7, and 8 Series Ignitions and all MSD Timing Accessories. MSD 8640 Crank Trigger Ignition Features: Fits Small Block Ford 289/302 and 351 Windsor engines Color: Red Bracket Material: Billet Aluminum Wheel Width: 3/8” Sensor Dimensions: ¾” x 2.25” Trigger Type: 4X Diameter: 6.562 in. Pickup Included: Yes Crank Trigger Wheel Included: Yes Adjustable Mounting Bracket Included: Yes Hardware Included: Yes Quantity: Sold as a kit Note: Must be used with 6.562 in. or smaller harmonic balancer. Street cruisers as well as Top Fuel dragsters trust MSD's ignition systems as the industry leader for over 40 years. MSD continues to push the envelope with cutting-edge ignition technology as well as intake manifolds and EFI systems.
