Hey,
I've got a 1st gen RX-7 with a S4 13B in it. I would like to know what the size of the sparkplug removal tool should be. I went to the store and bought a 13/16 but got it home and it wouldn't fit. Any help would be great.

thanks

 

I don't remember off the top of my head, but if you are going to replace the spark plugs, take one of the new ones to the store with you so you can buy the right socket.

 

13/16 should be the right size, unless u need the thin wall socket. the only other size plug i know of is 5/8.

 

13/16 is the size