I have a set of Denso iridium plugs in my Dakota and they work great and just installed a Denso downstream O2 sensor also. I think they make a good product. I have had more problem with champion plugs by far than any other plugs I have ever used. Just my 
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149,682,1641,1711 with a 12hp in it 1 8" brinly plow 1 10" brinly plow 451 snow blower,H-48 International snow thrower 42" york rake with fold down grader blade.
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