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Back to Back Comparison: NGKs vs ZR1 Plugs
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07-20-2013, 11:47 AM
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Nitroman28
Drives: 2010 Camaro SS 416/4L80
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Location: Arkansas
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You said it idled better with the ZR1 plugs. With them being a step hotter then the BR7's would that be the reason it idles better?
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