Loose Muffler/exhaust

[JkTheRipper]

Hey guys, I was hoping you could give me some opinions on whats going on::

what happened was this::

- I had a flat rear right tyre, so i took it to some tyre guys, and they replaced it for me.

- But in the process, they jacked my R34 GT up from the right side.

- Afterwards, I drove the the car immediately, and it was SO loud. like abnormally loud.

- Also, everytime i hit or released the brakes, there would be some kind of rattling noise. Sometimes even a screeching noise.

- So I had a look at the car, and i found that my exhaust pipe was kind of loose (ie. I could move it with my hands left and right without much force --> this also made the same, albeit softer, screeching noise)

I'm positive that the car did not sound like this before the guys at the tyre place jacked my car up, though I'm not sure how jacking the car up from the side could have caused this problem.

I was hoping for some advice or experience you guys may have had with this. Is this a big problem and should i be worried? Is the problem even with the exhaust/muffler ?

Any help would be greatly appreciated. Thanks in advance guys

[MrStabby]

- Afterwards, I drove the the car immediately, and it was SO loud. like abnormally loud.

- Also, everytime i hit or released the brakes, there would be some kind of rattling noise. Sometimes even a screeching noise.

- So I had a look at the car, and i found that my exhaust pipe was kind of loose (ie. I could move it with my hands left and right without much force --> this also made the same, albeit softer, screeching noise)

First thing i'd do is get under and check that all the exhaust bolts are present (check either side of the cat) and check the rubber mounts are still there.