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NGK Ruthenium HX spark plugs for ZL1 supercharged LSA 6.2L engine update:
"My name is Andrew Hauenstein and I manage the plug line. Good news and bad news here... We are working on a HX option for the supercharged version of the LSA 6.2L (supercharged) engine, but the part won’t be available until Jan 2020(tentative). Part number will be TR6BHX, but it does not exist yet (in case you try to order it). We are also going to make a step colder option (TR7BHX) for modified engines, but it too won’t be available until Jan 2020. In the meantime, please let me know if you have any questions."
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