MSD 8620 Flying Magnet Crank Trigger Wheel Kit Big Block Chevy 8 in. Red

The MSD 8620 Flying Magnet Crank Trigger Kit delivers race-proven ignition timing accuracy for Big Block Chevy engines equipped with an 8-inch harmonic balancer. Unlike conventional crank triggers that rely on steel studs and a magnetic pickup — a design vulnerable to false triggering from nearby bolts, debris, or vibration — the MSD Flying Magnet system takes a fundamentally different approach to signal reliability.

How It Works:

Four powerful magnets are permanently embedded in a billet aluminum trigger wheel. As the crankshaft rotates, the magnets pass by a stationary non-magnetic pickup, generating a precise trigger signal. Because the pickup itself is non-magnetic, it cannot be falsely triggered by stray metal objects or engine vibration — eliminating a common source of misfires and power loss on race engines.

What's Included:

• 8-inch billet aluminum Flying Magnet trigger wheel (Red)
• Non-magnetic crank trigger pickup
• Two-piece CNC-machined aluminum mounting bracket
• Mounting hardware and spacers for standard motor mounts or 0.25-inch motor plate applications

Key Features:

• False-trigger-proof design — non-magnetic pickup ignores stray metal, debris, and vibration
• Four embedded magnets in a precision billet aluminum wheel for consistent signal output
• CNC-machined aluminum bracket is slotted for a wide range of timing adjustments
• Dual-side bracket compatibility — mounts on either the driver's side or passenger's side of the engine in most applications
• Spacers included for use with standard motor mounts or 0.25-inch motor plate setups
• Compatible with MSD 6, 7, and 8 Series Ignitions and all MSD Timing Accessories

Sensor Dimensions: 3/4 in. x 2-1/4 in.

Note: For racing use only. Not legal for sale or use on emissions-controlled vehicles.