SKU: HLY558-102
UPC: 090127666722
MPN: 558-102
The Main Wiring Harness LS1 & LS6 by Holley is designed for professionals converting LS-series engines to modern fuel injection management. This harness is ideal for mechanics upgrading classic platforms, performance technicians managing engine swaps, or those working with Holley's HP/Dominator EFI systems.
This main harness integrates seamlessly with Holley HP and Dominator EFI platforms, providing the necessary electrical architecture for reliable ignition and fuel delivery. It features a 24x reluctor wheel configuration that ensures precise crank position sensing, which is critical for accurate spark timing and fuel pulse control across the RPM range. Built to OEM standards, the harness effectively manages critical sensor inputs while delivering power to fuel injectors and ignition coils.
Engine builders and technicians benefit most from this harness when performing LS engine swaps into non-OEM platforms, as it eliminates guesswork and ensures proper ground paths and signal integrity under full throttle operation. The design accounts for the complex wiring topology of modern LS powerplants, making it a reliable choice for any engine conversion project.
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