These plugs are great.
in a month
I installed these plugs on my 2006 Ford Ranger. The heat rating on these plugs is good, they're pre-gapped and ready to go. I installed these plugs along with Duralast Gold Plug Wires and Duralast Coil Pack-- my old 180,000 mile Ranger runs like new! Gas mileage has improved, and performance has GREATLY increased!
What kind of vehicle do you drive? 2006 Ford Ranger XLT