Holley EFI 556-128 Direct Ignition Coil

“Big Wire†Sub Harness- Pre wired with 12ga Power and Grounds, for optimal performance! Peak Voltage â€" 44,000 Volts Peak Output â€" 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!