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Vehicle Info Needed556-113 EFI Crank Trigger Kit Big Block Chevy w/Up To 7-1/4" Balancer
Ships on Nov 02, 2026
Lowest Price Guarantee- EFI Crank Trigger Kit
- Big Block Chevy w/Up To 7-1/4'' Balancer
- 35-Tooth Wheel
- 8'' Diameter Wheel
Holley's EFI Crank Trigger Kit is engineered to provide an accurate crank speed & position signal to Holley EFI systems in the most-demanding, high horsepower, racing applications. Crank position is measured every 10 degrees as opposed to every 45 degrees for a standard 4-Magnet, MSD 'style' Crank trigger. It is designed for use on early model BBC Chevy applications using a standard ATI or Fluidamper 'style' balancer up to 7-1/4' in diameter.
Features: - 8' diameter, 1/4' thick, billet steel, 36-1 tooth, crank wheel with Black Zinc Oxide finish for superior corrosion resistance & striking good looks.
- Crank wheel centers off of the balancer's hub, eliminating the need for a centering ring
- All billet, 6061-T6 aluminum sensor mounting brackets with 'bright-dipped' black anodized finish & Laser etched Holley EFI logo
- Custom 3-wire, ferrous-target, Hall-effect sensor with M12X1mm threads for finer gap adjustment
- All Grade 8 & Mil. Spec mounting hardware
- Will NOT work on balancers which do not have a center-hub extrusion (i.e.: Innovators West, etc.).
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
- Trigger an Accurate EFI Signal!
Holley Crank Trigger components are manufactured from high quality materials for strength & durability. These systems are designed to provide an engine speed signal specifically to Holley EFI systems only. The crank trigger wheel will provide a very accurate crankshaft speed signal to the ECU. These systems come with the hardware, sensor, and wiring necessary for installation.
NOTE: It will be necessary to move any engine accessories about 1/8" to accommodate the spacing the trigger wheel adds.
