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Cobra Forums
2013-14 Shelby GT500
Tuning and Mods
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<blockquote data-quote="Norton" data-source="post: 16165150" data-attributes="member: 145307"><p>I'm not used to disagreeing with you, J, but everything I've read says stock plugs are heat range 6... </p><p> - According to VMP, "TR7-IX... is a full step colder than stock."</p><p> - NGK recommends TR6-IX for stock GT500 applications</p><p> - Summit Racing recommends TR6-IX for stock GT500 applications</p><p> - American Muscle cites TR6-IX as "Perfect for Stock Boost," with TR7-IX being suited for "Increased Boost"</p><p></p><p>You have a great deal more experience than I do, so I have to ask what am I (they) missing?</p></blockquote><p></p>
[QUOTE="Norton, post: 16165150, member: 145307"] I'm not used to disagreeing with you, J, but everything I've read says stock plugs are heat range 6... - According to VMP, "TR7-IX... is a full step colder than stock." - NGK recommends TR6-IX for stock GT500 applications - Summit Racing recommends TR6-IX for stock GT500 applications - American Muscle cites TR6-IX as "Perfect for Stock Boost," with TR7-IX being suited for "Increased Boost" You have a great deal more experience than I do, so I have to ask what am I (they) missing? [/QUOTE]
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