cruiser
Well-Known Member
I have a 3/8" drive socket set and am looking to replace my spark plug socket. The size is 5/8" or 16mm. I use it on the NGK ZFR-5N plugs for my 1974 slant six. I need the special socket that is adapted to hold the plug firmly in position inside the socket so the insulator doesn't crack during installation. Any recommendations? Thanks.