E3 DiamondFIRE Sleeved Racing Spark Plug Wire Set for GM LSx E3.1509This E3 DiamondFIRE Racing Spark Plug Wire Set features a unique design that is engineered to work in concert with the E3 DiamondFIRE ignition system. The features include: GM LSx Angled Boots Fully Heat Sleeved Class F40 spiral conductor Rated at 40 Ohms per foot Impregnated with Ferrite, an iron alloy that improves magnetism 8. 5mm 100% silicone outer jacket encases a 100% silicone inner jacket with stainless steel locking terminals Rock solid