Just bought another Cossie & removed the plugs to check & found its fitted with Motorcraft Platinum AGPS092P spark plugs, iv'e only really used Champion C59C's in my other Cossie's with no problems so never heard of these plugs. Will they suit my car, its running RS500 8 inj & about 400bhp, has run fine except under full load in 5th on acceleration it dropped onto 3 cylinder at 130mph (private test track) backed off & has'nt been a problem since but not been upto that speed since. They are gapped at 0.75mm,last owner had them fitted 1 month ago whilst car was being serviced at GGR.

Cheers Simon.