Having a spring clean in the engine storage area, came across a couple of brand new but soiled Champion 11 COM plugs that I didn't know I had.
Anyone know what they fitted? They are listed as the hottest of that range and have an extended height body compared with 8 COM (for example)
They have a curious bit of corrosion on the tip of the threads, as though they had laid somewhere damp, but the points and everything is fine.
Peter
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