Overview Reviews Product Description 558-430 Holley EFI CAN ADAPTER/POWER HARNESS The Holley EFI Can Adapter/Power Harness adapts two pin Holley main harness CAN connectors to new style 4 pin CAN devices. Product Videos Custom Field Product Reviews Write a Review Write a Review × 558-430 Holley EFI CAN ADAPTER/POWER HARNESS Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *