September 28, 20159 yr comment_478150 I recently purchased a set of NGK for my Z.The caps on these were one piece. No threads to loosen. Link to comment https://www.classiczcars.com/forums/topic/52414-ngk-bpr6es-plug-cap-coming-loose-warning/?&page=2#findComment-478150 Share on other sites More sharing options...
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