The Haltech Plug & Play Adaptor Harness Kit for Nexus S3 ECU is designed to simplify upgrading your vehicle's ECU, enabling seamless integration with your factory wiring. By connecting directly to the Haltech Nexus S3 ECU and the factory harness, this kit streamlines the installation process, letting you unlock advanced engine management features with ease.Explore the key features of this adaptor harness kit:Plug-and-Play Design: Features factory-style connectors on one end and a Haltech-specific plug on the other, enabling quick and straightforward installation without the need for additional wiring or modifications, resulting in a hassle-free setup.Seamless Compatibility with Nexus S3 ECU: Ensures optimal communication between the ECU and your vehicle's sensors and actuators, providing precise control over fuel delivery and ignition timing for improved performance across all operating conditions.Fully Programmable System: Allows custom tuning and performance adjustments through Halte