MSD ASY12731 Flying Magnet Crank Trigger Wheel - Small Block Ford 6.562 in. Balancer

The MSD ASY12731 is a replacement Flying Magnet crank trigger wheel designed for Small Block Ford engines with a 6.562-inch harmonic balancer. This precision-engineered trigger wheel is sold individually and is a direct-fit replacement component for MSD crank trigger systems.

MSD's Flying Magnet crank trigger design delivers rock-solid ignition timing accuracy on high-performance and race engines. Rather than relying on a magnetic pickup, the system uses powerful magnets embedded in the trigger wheel that pass by a non-magnetic sensor, generating a clean, consistent trigger signal that is critical for engines operating under extreme cylinder pressures.

Key Features:

• Flying Magnet Design: Embedded magnets in the wheel trigger a non-magnetic pickup sensor for clean, interference-resistant signals
• 6.562-Inch Balancer Fitment: Sized specifically for Small Block Ford harmonic balancers
• Replacement Component: Sold individually — ideal for rebuilding or upgrading an existing MSD crank trigger system
• Precision Ignition Timing: Ensures consistent and highly reliable timing on performance and race engines
• Compatible with MSD 6, 7, and 8 Series Ignition Systems

Whether you're refreshing a worn crank trigger assembly or building a new performance ignition setup, the MSD ASY12731 provides the precision and durability required for serious motorsport applications — from drag racing to road courses.