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Holley EFI to Racepak CAN Adapter Kit

Holley EFI to Racepak CAN

PART# 558-447

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This kit is used to directly connect Racepak part number 230-VM-EFIHOL Vnet/Holley to either the J1A (HP and Dominator ECUs) or J3 (Dominator ECU only) connectors. There are three harnesses supplied in this kit. Terminated Holley EFI main harnesses come with one of two types of CAN connectors. Both adapters (Harness 2 and 3) are supplied in this kit.


  • Harness 1 – For Dominator ECU’s only. This is the J3 connector and has the CAN Bus 2 connector pre-wired.
  • Harness 2 – Connects to the CAN Bus 1 four pin connector found on some main harnesses.
  • Harness 3 – Connects to the CAN Bus 1 two pin Metripak connector found on some main harnesses.


BrandHolley EFI
Emission Code5
Product TypeCAN Extension Harness
Part Number558-447



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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Note that you must enable the terminator resistor in the Racepak module via Racepak datalink software.
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