Bolt tensile strength

[jason 82]

What tensile strength have my bolts got to be on the wishbones etc please ? 8.8 or the 12's ? Just wondered as I am about to go back through the car replacing stuff & torquing everything down & marking with my little tip ex pen all of the torqued bolts. Any help would be appreciated, I have the iva guide, but I must be going blind as I can't find anything about bolt strengths. Lol