Overview Reviews Product Description 558-306 Holley EFI Universal Unterminated Ignition Harness Universal Unterminated Ignition Harness for HP EFI & Dominator EFI Product Videos Custom Field Product Reviews Write a Review Write a Review × 558-306 Holley EFI Universal Unterminated Ignition Harness Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *