Spark Plug Wires-Range Rover
I'm with John on this one. I had no hopes of getting more horsepower out of a set of Magnecor wires. I purchased a set of OEM wires to replace OEM wires shortly after buying my RR used. A little more than a year later I experienced severe misfires/hesitation problems approx 700 miles from home (I didn't think it was something as simple as wires, I just replaced them).
I decided to find a better set of wires. I purchased the 8.5mm Magnecor wires. They now have 3-1/2 years and 40k+ miles.
I'll have to disagree with Kevin. They do fit in the stock wire looms (you just roll them in) and they do not interfere with the radio.