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Holley EFI 8" 12-1X Crank Trigger Wheel BBC/LS - 556-180
Upgrading to an MSD Flying Magnet Crank Trigger Kit will deliver the precise and reliable signal that a high performance engine requires. This kit gives you the ability to control timing electronically through a Holley EFI ECU (or other standalone engine management system / ignition controller). At the heart of the kit is the 3-wire Hall-Effect Sensor that is easier to set up, less susceptible to EMI/RFI interference/noise, and less likely to have false signals than other methods (Distributors and VR Magnetic Sensors). In addition, they are less prone to mechanical failure since there are no wear parts. With the included high quality timing pointer and the use of a direct bolt-on, degreed balancer (see below list for recommendations), you'll be able to adjust timing in the precise increments required for your engine.
  • Coyote 556-173
We recommend using ATI 918047-MSD but will also work with 918047N and 918047NA
  • LS 8 inch 556-174
Designed to work directly with ATI 917302, 918852, 917264 or 917242
  • LS 7.28 inch 556-175
Designed to work directly with ATI 917777, 917211 or 917234
  • LS 6.56 inch 556-176
Designed to work directly with ATI 917776 or 917215

Features:
  • Most accurate way to trigger your electronic fuel injection (EFI), can be installed as 12-1 or 12x
  • Powerful magnets embedded in a 3/8-inch thick billet 6061-T6 aluminum trigger wheel
  • 3-wire Hall-Effect Sensor that is not easily susceptible to EMI/RFI Interference
  • Engine specific kits include a direct bolt-on billet aluminum pick up bracket
  • Rigid mounting that will not flex and cause timing fluctuation
  • Easy to install much like traditional MSD Crank Trigger Kits
  • Included installation instructions cover mechanical setup and provide step-by-step Holley EFI Software Setup
Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Holley EFI Banner

Who is Holley EFI?

Holley EFI is a division of Holley that is one of the best aftermarket brands in the automotive industry. Holley EFI  is a company known for producing high-performance parts specifically electronic fuel injection system parts. The company’s history can be traced back to the late 1800s when brothers George and Earl Holley learned how to make pattern casting that enabled them to build one-cylinder engines. Then in 1903, they provided Henry Ford with the carburetor and became the industry leader in fuel system technology. The rest is, as they say, history.

Fuel System Experts

For over a century, Holley EFI has always been at the forefront of designing parts for the fuel delivery system. From electronic fuel injections kits and fuel system accessories, Holley  EFI has it all. Today, Holley EFI is considered one of the top aftermarket brands in the world.

Being Part Of History

Not everyone is aware that Holley provided fuel systems components for the military during WWII, and it is not for automobiles but planes and boats. Since then, the company has become a dominant force when it comes to fuel delivery system components and has been used by many champion racers and enthusiasts. 

Choice Of Champions

Since the 1960s, Holley has powered every NASCAR sprint cup car and every winning NHRA Pro Stock Team even today. It is a testament to the kind of products the company produces.

Purchase Holley Products At Vivid Racing

If you are in the market for high-quality fuel delivery system components for your vehicle, then choose the best brand out there, and that is Holley EFI. Not every company can boast 100 years of experience. 

To know more about Holley EFI, visit Vivid Racing and check out their list of products that fit your specific requirement.

90 Day Limited Warranty applies to B&M transmissions, launch control kits and all electrical components (switches, lights, solenoids).

Holley Performance Products warrants its Holley Street Avenger™ Carburetor to be free from defects in material and workmanship for the life of the product on parts and one year on repair labor. After a period of one year, Holley will charge standard rates for repair labor. For any Holley Street Avenger Carburetor used in any type racing or off-road use will only be covered by a one (1) year limited warranty on parts and labor. Warranty performance will be initiated by returning the alleged defective product to HOLLEY PERFORMANCE PRODUCTS with the original, dated purchase receipt. Purchaser is to call toll free the Holley Factory Service number at 1-866-464-6553 to receive details and shipping instructions.



For full warranty information please Click Here
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Sale price None
Wholesale price $247.76
Shipping Weight: 1.15
Length: 12
Width: 1
Height: 9
Product Added At Monday 30 January, 2023
Product Modified At Thursday 10 July, 2025
Imported By ETLOverride
Last Edited By vendordata@vividracing.com
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Vendor Inv Cost Retail Jobber MAP Core Updated
Holley Performance Products Inc. $209.97 $337.95 ? $299.95 ? 2025-07-10 19:13:18


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