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Factory Replacement Engine Looms

Bring the wiring back to new.

As these vehicles get older, the original engine harness can become one of the weakest parts of the car. Heat, oil, previous repairs and decades of use can leave wiring brittle, connectors damaged and old harness tape falling apart.

Ultimate Conversion Wiring can supply newly manufactured replacement engine harnesses for a growing range of Holden applications, from early VL, VN, VP, VR and VS models through to LS-powered VZ, VE and VF vehicles, including selected HSV and special-model applications.

UCW VE TR6060 factory replacement engine loom
Factory-style construction

New wiring where the old loom has had enough.

Our replacement looms are built from scratch using new automotive wiring, terminals and seals, with a combination of new and carefully selected second-hand plugs where required. The finished harness is protected in convoluted tubing and harness tape in the same style as the original factory loom, giving you a clean, factory-style installation rather than a modified old harness.

New automotive wiringBuilt as a replacement harness rather than reworking brittle old wiring.
New terminals & sealsFresh terminals and seals used throughout the newly manufactured loom.
New & selected used plugsA combination of new and good-quality second-hand connectors is used where required.
Factory-style finishConvoluted tubing and harness tape keep the finished loom looking at home in the engine bay.

Ideal for restorations, engine-bay tidy-ups, or replacing an ageing factory harness before it becomes a problem.

Examples of our work

Factory replacement engine harnesses

Some examples of replacement engine looms we have manufactured. These are built to replace the ageing factory engine harness while retaining the original-style layout and finish.

Current range

Looms that we cover

The range includes everyday models as well as selected special applications that are becoming increasingly difficult to find good original wiring for.

Battery / Starter / Alternator HarnessesVN–VS
Factory Knock Wiring Add-OnVN–VS
VL5L — VL Group A
VNV6 — Early & late body/fuse box plugs5L — Early & late body/fuse box plugs5L — VN Group A
VPV65L
VRV6 — A4 4L60E & T5 Manual5L — A4 4L60E & T5 Manual
VSV6 — A4 4L60E & T5 ManualV6 — Getrag ManualV6 S/C L67 — A4 4L60E5L — A4 4L60E, T5 Manual & Getrag ManualSeries 1, Series 2 & Series 3 applications
VTV6 — A4 4L60E & Getrag ManualV6 S/C L67 — A4 4L60E5L — A4 4L60E & Getrag Manual5.7L — T56 Manual
VT–VYLS1 — A4 4L60E & T56 Manual, with or without traction control
VZLS1 FBW — A4 4L60E & T56 Manual6L E38 — A4 4L65E & T56 ManualHSV E40 — A4 4L65E & T56 Manual
VE6L/6.2L — A6 6L80E, T56 Manual & TR6060 Manual
VF6L/6.2L — A6 6L80E & TR6060 ManualLSA — A6 6L90E & MG9 Manual
Another combination?

Don't see your exact combination?

Our replacement harness range is continually expanding. Contact us with your vehicle, engine and transmission combination and we can confirm availability.

CONTACT UCW