Hi,
Just bought some more plugs for my car, Bosch R6,
Also on the plugs are small numbers, three have 965 four have 685 and one has 082,
Anyone have any idea what these are ?

I think they are casting, or, manufacturing machine numbers for quality control.

Thanks for that, i was wondering whether they might be some kind of heat ranges and i'd got different ones
ta

I was wondering about spark plugs too for the 2.0l Pinto, what works best etc. I have seen alot of people opting for NGK plugs, but I've also seen Splitfire plugs advertised for the pinto too, would there be any advantage from one over the other ?