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  • Holley EFI 558-420 Terminator EFI Input/Output Kit
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Holley EFI 558-420 Terminator EFI Input/Output Kit

Holley EFI
GVMR_558-420
558-420
Ships from Manufacturer
Engine Control Module (ECM) Wiring Harness
$80.31
PN 558-420 contains 5 extra input/output wires that the base Terminator EFI harness does not contain....
⚠️ SPECIAL ORDER — Additional shipping fees may be required.
EMAIL US the PART NUMBER and your POSTAL CODE for a quote.
Holley EFI 558-420 Terminator EFI Input/Output Kit
Description
PN 558-420 contains 5 extra input/output wires that the base Terminator EFI harness does not contain. It contains Input wires for Inputs 1-4. It contains one wire for Output 2. These inputs and outputs can perform features and functions that must be programmed via Holley EFI laptop software. The software also contains instructions on how to program these.
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