7 - 17 ftlbs or 23 nm
9 - Doesn't say
12 - Diagonal brace to body M10 - 48 ftlbs or 65 nm
13 - Diagonal brace to rear cross member M12 - 82 ftlbs or 110 nm
With 9 I'd say take an educated guess based on the above.
I have the PPBB titanium stud kit about to be fitted to my 996 Carrera.
I have found the torque setting for the standard bolts is 26Nm (19 ft/lb).
When using K nuts as supplied with the kit what torque setting should I use?