I found out that 5/8 works. Though Zetec Racing told me it's 16mm which is probably more correct. I only break the ceramic when I'm getting them out. Seriously, I broke the ceramic on one plug and messed up my spark plug socket, but I got it out.
"Wow, that sank fast." "Yeah, like a rock." 96 Contour GL ATX 9mm Ford Racing Wires; 2 Resonators down, 1 to go;"Special airbox"; many mods planned Sony CD player: 50wattsx4;remote; Speakers=50 watt Pioneer 6x8s Ross Evans
throw it up on a car window on a passenger windows and it will make it shatter without much force behind th throw
To be installed: -New BAT H20 Metal pump (got it) -Bosch Platinum plugs (got them) -9mm fordracing wires (on order) -rear bushings clunk clunk arg! -Intake when $$ is available
Installed: -17" BSA Rims and Kumho 712's -Pioneer Deck and 5x7's -Side markers, ding strips gone
Seriously, I broke the ceramic on one plug and messed up my spark plug socket, but I got it out.