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Spark plug heat range Plugs champion alike comparison Champion spark plug chart plugs conversion heat range racing reach cold hot hex 14mm ngk ignition j8c hotter numbers bosch
Spark plug heat range champion plugs reference cross codes table chart tr6 number hotter matchless threads ignition which found power Champion 792 c59yc 14mm spark plug, .750 reach 5/8 hex 59 range cold
Champion - Racing Heat Range and Tuning Guide - The Imp Site
Spark Plug Heat Range
Champion 792 C59YC 14mm Spark Plug, .750 Reach 5/8 Hex 59 Range Cold