Crudely attached the £15 backbox I got off some dude on gumtree. I welded on the stock hangars quite well and then things went south from there. My subpar rushed welding on the pipe join led to the incredible butchery below at the bottom of the post. The funniest part is that it isn’t even loud, it sounds stock almost below 4k rpm.

The old one on the right, it had mostly uninstalled itself already.
The worst thing I’ve ever done to a car.

It still leaks...