For what its worth, I just changed from the Bosch to MotorCraft plugs and Ford Racing 9mm wires, the old wires were red noname junk. Bosch plugs and junk wires were on the car when I bought it. The car has run better since then.I noticed that the front bank plugs were carboned up and the rear banks were nice and clean. I made my choises after reading the SHO Shop web page, I had not found this site at that time. Good luck with your combination.
