Got to add to the feeling on Chinese sourced plugs, noooo! Don't even think of putting them in your pride and joy, imagine how you would feel if after a time one of them decided to let go of an earth electrode and it then rattled around in the cylinder trashing the piston crown, chipping the valve rims not to mention the state the bores would be left in. How cheap would these (prob fake labelled Denso) plugs work out then.
paul m.