MSD 31249 8.5mm Super Conductor Spark Plug Wire Set Copper alloy conductor has a resistance value of less than 50 ohms per foot for superior spark One end has 90 degree bent terminal (MSD logo) and other has the HEI end(90 degree) to fit MSD distributor wire retainer. Ferro-magnetic impregnated core creates an effective EMI choke Forty feet of conductor is wound into a single foot of wire for high EMI suppression; Conductor core features DuPont Kevlar material for increased tensile strength Durable outer sleeve is a proprietary compound for resistance to high heat or abrasion Stainless steel terminals feature dual crimp tabs to grip wire conductor and outer jacket separately