Product Summary

44000 volts Maximum Voltage

  • Allows your ignition system to handle 5.5+ HP per Cubic Inch
  • Has 44,000 Volts of peak voltage and a peak output of 102 Mj
  • Comes pre wired with 12ga Power and Grounds, for optimal performance
  • Kit contains two Terminated Sub-Harnesses, and Eight Holley Smart Coils, 3 ft. of wiring loom for a professional appearing installation
  • The sub Harness features Fully Terminated Coil Connectors, a 7 Pin Metripak Connector used on several Holley EFI C-N-P Main Harnesses, and 3 loose wires for a quick installation
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Key Specs

MFG. Part #556-128
BrandHolley
Maximum Voltage44000 volts
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Holley 556-128 Details

Do you need precision control over your ignition system? Would your combination benefit from Individual Cylinder Timing Control? Are you experiencing spark issues with your Stock Coils? Are you wanting to convert your Turbocharged Big Block Monstrosity to Coil-Near-Plug?! Problem solved, introducing the Holley EFI Big-Wire C-N-P Kit containing everything you need to upgrade your ignition system to handle 5.5+ HP per Cubic Inch
Features:

  • “Big Wire” Sub Harness- Pre wired with 12ga Power and Grounds, for optimal performance
  • Peak Voltage – 44,000 Volts
  • Peak Output – 102 Mj
  • Maximum Battery Voltage 17.0 Volts
  • Upgrading a Non C-N-P Main Harness requires the Holley Universal Coil-On-Plug Harness, P/N 558-307 to complete the installation
  • Contains two Terminated Sub-Harnesses, and Eight Holley Smart Coils, 3 ft. of wiring loom for a professional appearing installation
  • Sub Harness features Fully Terminated Coil Connectors, a 7 Pin Metripak Connector used on several Holley EFI C-N-P Main Harnesses, and 3 loose wires for a quick installation

Charts

CARB Warning

For race/ off road use only

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Holley 556-128 Specifications

KEY SPECS
MFG. Part #556-128
BrandHolley
Maximum Voltage44000 volts
GENERAL
GTIN Code090127002544
Sold in QuantityEach

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