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Ari Henning on Instagram: “What's with the grease and grooves on this spark plug? 🤔 It's a DIY thread chaser for cleaning up buggered spark plug threads! Use a Dremel…”
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FRZY Thread Chaser, Heavy Duty Metal Straighten Anti Deform Black Oxygen Sensor Rethread Tool for Professional DIY : Amazon.co.uk: Automotive
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