Prior tPo riniostralltaotioninpsletaaslleactioonnfirmpslepaarskeplucgorencfoirmmmesnpdaatriokn plug recommendation with cylinder head manufacturer with cyalinndde/roheraednmgainnuefabctuurieldr eanrd/t/uorneenrgifnoerbpuirldoepr/teurnehreat range or type of plug. for proper heat range or type ...