Noise under the bottom — logbook Toyota Will VS 2001

Noticed noise under the bottom. Especially when hitting bumps. I rethought everything I could.
It turned out that the previous owner for 4 years pokatushek never bothered to cut the catalyst. On the small-wavy roads of Sochi, the ceramics in the catalyst still crumbled.

Went to the station. The master turned out to be not a fool - he did not look for a pipe in diameter and adjust it in length, he simply made a surgical incision in front of the catalyst, knocked out the remains of ceramic "honeycombs" and welded it back. And… voila! the noise is gone