Ensure seamless integration and reliable performance with the Holley Dominator EFI J3 P3 Auxiliary Harness. Designed with precise dimensions of 26.40 cm by 25.90 cm and weighing only 0.54 kg, it delivers a compact, lightweight solution for your electronic fuel injection system. Explore how this harness elevates your ECU setup to the next level.

Optimize engine management with precise control and real-time data display on a vivid 12.3-inch color touchscreen. Measuring 42.9 cm in length, this compact unit integrates seamlessly into your setup, providing intuitive access to critical fuel system parameters. Discover the advanced capabilities that elevate your vehicle's performance and diagnostics.

Ensure seamless integration and reliable communication between your engine control unit and vehicle sensors with the Holley LS1 Main Harness. Precision-engineered at 38.60 cm by 37.30 cm, this harness supports HP and Dominator EFI ECUs, delivering optimized electronic fuel injection performance. Discover how this tailored harness enhances your fuel system's efficiency and responsiveness.