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So what is everyone's opinion on changing out the plugs on my 2008 GT500 with a KR tune at 7500 miles?
Not sure if I should and if I should, what is the most popular plug to go with?
There is a ton of info out there just not sure on which way to go or if it s even necessary?
 

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2010 Grabber Blue Gt500
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NGK TR7ix and I change mine every 10k miles. Gap erosion is about .003 at that milage. I drive the poop out of mine
 
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