HOLLEY Holley Efi 8" Hall Effect Sbc Crank Trigger System Holley's EFI Crank Trigger Kit is meticulously designed to deliver precise crank speed and position signals to Holley EFI systems, particularly in high-horsepower racing scenarios. Unlike standard 4-Magnet, MSD "style" Crank triggers that... MSRP: Was: Now: $749.95 Add to Cart