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...I live in Panama City, Fl, and soon will be purchasing your ECU and Boost jets, which will bring me up to stage III. By that time I will also have downpipes and will have knocked out my cats - I am confused on what spark plugs I need. I know climate is a deciding factor, so I was wondering what heat range plug you are using (since we live in pretty much the same area). Search just confused me. I thought the "PFR6B-11B" heat range was stock, but it says "PFR5B-11B" is. What heat range should I go to for stage III plus downpipes and cats? PFR6B-11? PFR6B-11B? PFR6B-11C? Help please!
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