Overview Reviews Product Description 558-204 Holley EFI Universal Unterminated Injector Harness Universal Unterminated Injector Harness for HP EFI & Dominator EFI(Bosch EV1 style). Product Videos Custom Field Product Reviews Write a Review Write a Review × 558-204 Holley EFI Universal Unterminated Injector Harness Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *