so I'm going to school for automotive technology so I took all of my tools to school but I need to pull the diverter valve to cat tube off of my camaro at home. Does anybody know what size bolt they use on the backside of the passenger head/block where the tube and ground strap are mounted? i really don't want to lug all of my wrenches home to find one that fits. I already figure I'm going to need to drop the y pipe to get to it from underneath and i have sockets that I keep at home so that should work but I can't get a ratchet and socket up into the area to pull that bolt. I know it's a stupid question but help is much appreciated

 

I believe it is a 10mm

 

take a ratcheting wrench and you can get to it from the top, but it's a tight fit.