EFI Injector Harness - Universal Unterminated

The EFI Injector Harness - Universal Unterminated from Holley is an essential component for builders and mechanics transitioning to electronic fuel injection systems or upgrading existing EFI platforms. This universal harness serves as the backbone for fuel injector wiring, allowing technicians to customize termination points to match their specific engine bay layout, ECU configuration, or OEM integration requirements. Whether you're converting a carbureted engine to modern fuel injection or fine-tuning a performance build, this harness eliminates the guesswork of piecing together individual injector leads.

As an unterminated harness, the EFI Injector Harness provides maximum flexibility in connector selection and installation depth—a critical advantage when working with non-standard engine configurations or retrofit scenarios where factory harnesses won't fit. The universal design accommodates fuel injectors across multiple displacement ranges and cylinder counts, eliminating the need to stock multiple harness variants. Weighing only 0.89 lbs with compact dimensions of 10.7 x 2.3 x 10.8 inches, this harness won't clutter your engine compartment while delivering reliable signal transmission from the ECU to each injector solenoid with minimal electromagnetic interference.

This harness is ideal for hot rod builders, engine swap specialists, and performance shops tackling LS conversions, carb-to-EFI conversions, or custom engine bay layouts where off-the-shelf solutions fall short. Technicians who value control over their fuel delivery system architecture will appreciate the unterminated configuration—you decide how to terminate each injector lead based on your ECU connector type, whether that's Deutsch, AMP Superseal, or custom connectors. Installation requires basic automotive electrical knowledge and a crimper suitable for your chosen terminals; Holley's reputation for precision engineering ensures consistent contact resistance and long-term reliability under the thermal and vibration stresses of modern engine bays.