R36 Exhaust tips removal

[GLF118TSI]

Morning,

Unfortunately i backed into some low boulders and crushed the exhaust tips. On close inspection the lip has been crushed in and the entire cylinder has buckled.

I would like to know how to remove the tips to either replace or to repair. Are they clipped on and remove by mallet, or they are welded on?

Any advice appreciated.

TIA

[Passat R36]

Welded on, have to cut