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Cobra Forums
2013-14 Shelby GT500
Time for new spark plugs
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<blockquote data-quote="Norton" data-source="post: 16359971" data-attributes="member: 145307"><p>I also run 0.030 gap. I know VMP pushes Brisk plugs, but I've heard mixed reports on them - some engines like them, while others don't. </p><p></p><p></p><p>Mine are <a href="https://www.americanmuscle.com/ngk-sparkplugs-4477.html" target="_blank">NGK Laser Iridium Performance Spark Plugs (03-04 Cobra; 07-14 GT500) Item 64019</a>, which are TR7-IX (NGK Stock# 3690) / Heat Range 7 plugs. AM 64072 corresponds to <a href="https://www.americanmuscle.com/ngk-iridium-3691.html" target="_blank">NGK Iridium IX Spark Plugs - Heat Range 8 (03-04 Cobra; 07-14 GT500)</a>, which are TR8-IX (NGK Stock# 3691) plugs. You really should check with your tuner to confirm what's right for your specific application and location/elevation. FWIW, I bought my first set through eBay and a spare set through Amazon. Make sure you deal with reputable sellers, however, to avoid conterfeit junk.</p><p></p><p>I installed a 90mm idler on mine for belt slack as well.</p></blockquote><p></p>
[QUOTE="Norton, post: 16359971, member: 145307"] I also run 0.030 gap. I know VMP pushes Brisk plugs, but I've heard mixed reports on them - some engines like them, while others don't. Mine are [URL='https://www.americanmuscle.com/ngk-sparkplugs-4477.html']NGK Laser Iridium Performance Spark Plugs (03-04 Cobra; 07-14 GT500) Item 64019[/URL], which are TR7-IX (NGK Stock# 3690) / Heat Range 7 plugs. AM 64072 corresponds to [URL='https://www.americanmuscle.com/ngk-iridium-3691.html']NGK Iridium IX Spark Plugs - Heat Range 8 (03-04 Cobra; 07-14 GT500)[/URL], which are TR8-IX (NGK Stock# 3691) plugs. You really should check with your tuner to confirm what's right for your specific application and location/elevation. FWIW, I bought my first set through eBay and a spare set through Amazon. Make sure you deal with reputable sellers, however, to avoid conterfeit junk. I installed a 90mm idler on mine for belt slack as well. [/QUOTE]
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2013-14 Shelby GT500
Time for new spark plugs
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