Hello Sergei, I've had the same question for years regarding "why race teams don't use" and that is among the reasons I switch all of my applicable vehicles to Taylor Spiro-Pro wires @ my first plug/plug wire change. Taylor cable, located here in Missouri, makes the finest, longest-lasting spark plug wires that I have ever seen. The set that I installed on my S-10 12 years ago still fire the engine today, with no "leaks" or apparent damage! They are the toughest covered, w/spark plug boot molded right on to the wire, teflon(?) coated stainless spiro-wound cores. Under the hoods of the local oval track racers these, or the accel wires are usually found. I'm not an accel plug wire fan, so I use Taylors. (although I use accel coils, p/u modules, etc.) I'm not sure about the resistance, but they are nearly indestructable, high heat resistance, and very pretty, available in many colors! Great performance wires, which I usually hook to NGK plugs when availalble for the application. They don't make a Rover specific set, so I assembled mine from an 8 cylinder custom-make set, filled the boots w/dielectric grease & forgot about em'! @ the same time I did one of my four cylinders w/a 6 cylinder set, leaving me a spare cable for each vehicle. (Although I doubt I will ever need em') Good Luck, LRW.