Gen IV Standalone

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Open Monday - Friday 9A-5P EST
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We're closed on major holidays.

Standard order lead time for STANDALONE WIRING HARNESSES is estimated to be 11-13 weeks from date of purchase.
Need it sooner? Give us a call to discuss expediting. Limited slots available.
All other items typically ship within 3-5 business days unless specified otherwise.

LS and LT Retrofit Specialists
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Home > Gen IV LS / Vortec Harnesses > Speartech Standalone Harnesses

Speartech Standalone Harnesses

All pricing shown is for our default harness layout which is a 42" long harness that originates off the passenger side rear head. Custom layouts are available for an additional fee. Call to order a custom layout harness.
If you all ready have an ECM, TCM, and throttle pedal for your swap project, or prefer to find the parts on your own, then we offer our Speartech standalone harnesses by themselves.

We have been in the business for over 20 years perfecting the process of LSx harness building to ensure an accurate fit, quality appearance, and trouble-free operation. All harnesses are built in house, on an actual engine and test ran with a GM Tech 2 diagnostic scan tool hooked up to ensure proper functionality before shipping.