Plug Adapter 10 mm to 1/4-32 mm for 1/4-32 Spark Plugs - CH-ignitions
My 10mm plug collection :) my ears clearly got angry at me for changing them so much haha. (i also have a huge bag of silicone tunnels but that's boring) : r/Stretched
GM High Performance 10 mm Yellow Spark Plug Wire Set 48314Y For Use wi – ABC Direct Auto Parts