Removing M25-XP Exhaust Riser

[Project_Mayhem]

Does anyone know what size wrench to use for the lower, larger bolt on the flange that the riser is attached to? I can't get a socket on there without it slipping due to the elbow. The socket is at too much of an angle on this rusted stud and bolt. Is it safe to use a torch on this?

 

[Stu Jackson]

Same size as the other nuts on those studs.

Here's a tip:
Muffler & Exhaust Riser Replacement 101 (2015 Tech Note with Tips & Tricks)
Muffler & Exhaust Riser Replacement – 2015 – Catalina 34 International Association