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Cobra Forums
SVT Shelby GT500
2009 Spark plugs for 2.5" pulley
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<blockquote data-quote="OldYeller" data-source="post: 15831698" data-attributes="member: 162443"><p>FWIW I ran the stock plugs on my 11 and my 12 with the 2.5 vmp pulley with zero issues. My 11 only had 8k miles on it with stock plugs when I did the pulley swap and I ran it that way for almost a year before swapping to the TVS, at which point I swapped to the NGK’s. TR6IX should be stock heat range equivalent and the tr7ix is one step colder.</p></blockquote><p></p>
[QUOTE="OldYeller, post: 15831698, member: 162443"] FWIW I ran the stock plugs on my 11 and my 12 with the 2.5 vmp pulley with zero issues. My 11 only had 8k miles on it with stock plugs when I did the pulley swap and I ran it that way for almost a year before swapping to the TVS, at which point I swapped to the NGK’s. TR6IX should be stock heat range equivalent and the tr7ix is one step colder. [/QUOTE]
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SVT Shelby GT500
2009 Spark plugs for 2.5" pulley
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