Originally Posted by HJF
I’m thinking of changing my plugs over Winter but am confused by the details in the owner’s handbook. They are currently Factory fit. I haven’t pulled them yet. Does anyone know the part numbers for both the Ford and NGK basic standard plugs? 4/4 Ford Sigma engine.
Thanks,
H


So what I am thinking for a Sigma is Motorcraft AGSF22FSCM, or NGK TR5B-13 with a gap of 1.2mm??