Difference between these 2 types of Motorcraft spark plugs (1 Viewer)

ToyotaTrk

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So im trying to find someone who can tell me or tell me where to look for the difference between these 2 plugs - both Motorcraft - Ford. I cant find a motorcraft number, ford c/s says call the dealer and the dealer doesnt know. Hell, ford c/s actually gave me a number for a tech line and it ended up being there retails number for sales for clothing. Then i got a number for Ford Power Products which actually sells car generators!!! Im surprised anyone knows what the hell is going on over there.....

SP-400, AGSF22N AND SP-521, AGSF22F1

Tks much
 

ToyotaTrk

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Aug 31, 2018
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161
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Louisiana
Tks. been trying to figure it out. looks like one is nickel and the other platinum if I remember correctly. but I did find some info and the heat ratings look the same. 2 if I remember correctly. its actually for a 5.4L ford v8 for a generator and the damn generator co., generac won't give me a crossover no. and these 2 are what im being told....
 

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