Holley EFI HP EFI Engine Control Module - Wiring Harness - LS2/LS3/LS7 - GM LS-Series 20-OTL-NR-5XL Cylinder number appears on each

Cylinder number appears on each wire

Jet Extensions

1965-1967 Chevrolet Chevy II

Black Powdercoated Steel Shroud

Holley EFI HP EFI Engine Control Module - Wiring Harness - LS2/LS3/LS7 - GM LS-Series 20-OTL-NR-5XL Cylinder number appears on eachECU is certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance. Holley HP EFI systems are equipped with 4 programmable inputs and 4 programmable outputs that are ideal for most vehicles with a single power adder. This feature allows the user to configure the system to support a wide range of controls including boost control, progressive nitrous, water meth injection, speed inputs, fuel pump