Engine Harness

Kustom Truck Parts' Engine Harnesses are your comprehensive source for high-quality wiring solutions tailored to Caterpillar, Cummins, and Detroit engines in Kenworth, Peterbilt, Freightliner and Western Star heavy-duty truck applications. Here, you'll find a full range of specialized engine harness products engineered for engine conversions, swaps, repowers, and reliable OEM-style replacements—helping mechanics, fleets, and owner-operators achieve seamless integration, modern performance, and minimized downtime.

All harnesses emphasize OEM-grade durability, precise fitment, and direct-fit reliability—whether for targeted repairs, full engine upgrades, or unique builds. Browse the collection to find the exact harness for your Caterpillar, Cummins, or Detroit engine project, and contact us for serial number verification or expert guidance on your truck conversion.
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