Overview Reviews Product Description 558-102 Holley EFI LS1/6 (24x/1x) Engine Main Harness This harness is designed for LS1/6 Engines, from 1997-2004. This harness interfaces with 24x Crank and 1x Cam sensors. Product Videos Custom Field Product Reviews Write a Review Write a Review × 558-102 Holley EFI LS1/6 (24x/1x) Engine Main Harness Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *