HP ECU & Harness LS1/LS6 NTK

The Holley HP ECU & Harness LS1/LS6 NTK is a complete engine control module and wiring harness kit designed for LS1 and LS6 engines in GM LS-series applications. This integrated fuel injection management system combines the ECU, OEM-quality wiring harness, NTK oxygen sensor, and a 24-tooth reluctor wheel to establish precise engine control without aftermarket guesswork. For builders installing LS powerplants into street cars, race vehicles, or restomod projects, this kit eliminates the need to source individual components and troubleshoot harness compatibility issues separately.

The kit includes the Holley HP EFI engine control module tuned for LS1 and LS6 specifications, a factory-style wiring harness sized and pinned for direct integration, an NTK oxygen sensor for closed-loop fuel correction, and a 24-tooth reluctor wheel for crank trigger input. The 24-tooth configuration is the factory standard for LS engines and ensures reliable signal recognition and timing accuracy. The oxygen sensor allows the ECU to monitor combustion efficiency and adjust fuel delivery in real time, critical for meeting emissions standards or optimizing performance across varying conditions. This architecture reduces installation complexity compared to standalone systems while maintaining the reliability of OEM-sourced sensor technology.

This kit is purpose-built for LS engine swaps into non-LS platforms—truck beds, classic muscle cars, kit cars, and race chassis where modern fuel injection and ignition control are mandatory. Builders switching from carburetors or older fuel systems benefit from sequential fuel injection mapping and direct spark control. The complete harness eliminates custom wiring runs and reduces integration risk, enabling faster engine startup and easier tuning validation during initial dyno work or shakedown runs.

Holley HP EFI systems are widely adopted across LS swap communities and professional engine builders because the ECU firmware supports broad tuning flexibility while the harness quality reflects OEM manufacturing standards. This kit bundles the core components needed to move from engine assembly to ignition without secondary sourcing, saving time and reducing the chance of impedance mismatches or signal noise common in pieced-together systems.