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NGK spark plug heat range
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07-26-2013, 01:42 PM
PLDRIVE
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Join Date: Jan 2008
Location: Nashville, TN
Cobra Make, Engine: Backdraft, SBF 351w (463 CI)
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I would start with a 6 or 7 (6 being hotter). But u can call or email NGK for better advice.
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