Disadvantages of a cold plug
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From: Bloomington-Normal, IL 1997 SE
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Originally Posted by macho_mike21
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From: Westerville, Ohio 2000 Black SSEi
104 is 2 steps (605 is 1 I think) ,103 is 3 steps cooler. I would go with 1 step colder in your situation but if you plan on doing fast modding you can get the 2 stage now and check the plugs after 1000 miles or so too look at the coloring.
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