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Champion plug heat ranges, need a bit of info please

2K views 4 replies 3 participants last post by  70060EPRO 
#1 ·
Just found a set of RS14YC plugs on the shelf, I know they will fit my vortec heads, but where/how can I look up the heat range for these vs. other 10YC, 12YC and the 6-suffixed plugs like RS14YC6?
 
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