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.

Optimize engine management with precise control on a compact 3.5-inch touch LCD screen. Measuring 27.7 cm by 16.4 cm, this Holley EFI interface offers intuitive adjustments and real-time data monitoring. Discover how this advanced display enhances your electronic fuel injection system.

Optimize engine performance with precise electronic fuel injection control. This Holley DOMINATOR EFI ECU weighs 3.64 kg and measures 42.9 cm by 21.6 cm, engineered for seamless integration and reliable operation. Discover how advanced control can elevate your fuel system management.

Optimize engine performance and reliability with the Holley EFI ECU ONLY HP STYLE. Weighing just 2 kg and compact at 24.9 cm by 19.8 cm, this ECU delivers precise electronic fuel injection control without bulk, ensuring seamless integration into your fuel system. Discover the advanced control capabilities that elevate your engine management.