Overview Reviews Product Description 558-508 Holley EFI Universal Ford V-8 Harness Kit Universal Ford V8 Harness Kit for Holley HP and Dominator ECU's Product Videos Custom Field Product Reviews Write a Review Write a Review × 558-508 Holley EFI Universal Ford V-8 Harness Kit Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *