Overview Reviews Product Description 561-101 Holley EFI Spark Plug Wire Set Holley EFI LS wires are designed to work with Hooker shorty headers to prevent burns resulting in misfires. Product Videos Custom Field Product Reviews Write a Review Write a Review × 561-101 Holley EFI Spark Plug Wire Set Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *