Out of stock
SKU: HLY550-603
UPC: 090127666937
MPN: 550-603
The Holley ECU & Wiring Harness LS2 is a complete engine control and fuel injection system solution purpose-built for LS2-powered vehicles and custom engine swaps. This integrated package eliminates the complexity of sourcing separate components and figuring out harness routing on your own, making it an essential upgrade for anyone building a street machine, restomod, or high-performance project car.
Holley's reputation for precision fuel injection control translates directly into this harness design—the wiring loom is engineered to minimize EMI (electromagnetic interference) and ensure clean signal paths from sensors to the ECU. The system includes all connectors, relays, and protective elements needed for LS2 integration, allowing you to bypass the factory GM harness entirely or simplify a non-factory installation.
LS2 engine swaps benefit most from this turnkey solution—it's ideal for Chevrolet Corvette, Camaro, and Pontiac GTO owners upgrading their fuel management, as well as hot rodders installing LS power into non-GM chassis. This system provides the foundation for reliable, repeatable engine management and cold-start compatibility.
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