exhaust tubing size?

[moalaska]

does anyone know the size of the pipes going into the rear muffler. my muffler is getting loose, I was thinking about replacing it with dual glasspacks, and then have center quad tips, I have 2 sets of 3" Monza dual resonated tips. I am thinking the pipes are around 1.75 or 2". any ideas?

[mooseheadm5]

I'd you have a 535, it is 45mm.

Quad tips will probably look silly.