Holley Part Number: 558-401
This harness is the J2A auxiliary harness for the Holley Dominator EFI.
Holley HP EFI
Holley Dominator EFI
Gen 1 Lightning Holley HP EFI & US Shift Complete Package
Gen 1 Lightning Holley Terminator X EFI & US Shift Complete Package
Holley Sniper EFI - Black