Holley 558-102 LS EFI harness - $425 (Kalispell)

Holley 558-102 LS EFI harness 1 thumbnail

condition: excellent

make / manufacturer: Holley

model name / number: 558-102

QR Code Link to This Post

Slightly used, but in perfect condition. This harness was mounted and was to be used with a Holley Terminator X. The 1-bar MAP sensor plug end was removed and the built in sensor in the ECM was to be used. A new MAP plug will need to be installed .
An adapter will be needed for the O2 sensor. Some of the plug ends may not fit your sensors, but Holley has adaptors if needed or change the sensor.
This harness should work with any of Holley ECMs. Please ask any questions.
$425.00. OBO

Please no texts or emails!

post id: 7949083277

posted: 2026-07-23 15:30

updated: 2026-08-24 08:07

♥ best of ^[?]

reading

writing

saving

searching

refresh the page.

Holley 558-102 LS EFI harness - auto parts - by owner - vehicle...

Slightly used, but in perfect condition. This harness was mounted and was to be used with a Holley Terminator X. The 1-bar MAP sensor plug end was removed and the built in sensor in the ECM was to...