Difficult Wiring Made Easy

Simplify Rewiring With A Plug-and-Play Harness That Matches Your Build

Compatible With Chevy Connections and Sensors

Pre-Built Wiring Bundle Tailored To Your LS Engine

Huge Selection of Harnesses in Stock and Ready to Ship!

SHOP LS SWAP WIRING HARNESSES

In Stock and Ready to Ship!

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HIGH QUALITY

Premium Connectors and Wire

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BUILT FOR LS SWAPS

Tailored for Chevy LS Engines

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PLUG-AND-PLAY

Hand Tested and Install Ready

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Premium Materials

High-temperature wire and durable connectors power your build with reliable conductivity.

Matched To Your Build

Our wiring harnesses are constructed to suit your exact LS engine and transmission combination.

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KARL Tangled Wires

No Rewiring Confusion

Wiring can be the largest headache of your LS swap project - keep it simple with a prefabricated LS wiring harness.

Supports Upgrades

LS swap wiring setups can be compatible with various drivetrain combos to grow with your project.

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Install Ready

Karl Kustoms wiring harnesses are ready to connect right out of the box, saving hours of trial-and-error.