FAST 301185 Magnet Crank Trigger Kit for Chevy BB w/8" Harmonic Balancer

Magnet Crank Trigger Kit for Chevrolet Big Block w/ 8 Inch Harmonic Balancer FAST's Magnet Crank Trigger Kits are setting the new industry standard for timing accuracy while preserving compatibility with other brands' ignition systems. Crank triggers are known to provide the most accurate crankshaft rotation measurement