Can damaged exhaust cause poor acceleration and stalling?

[SpeedySpeedBoy]

So bought my car back from garage a while ago and noticed that it sounded quiter, less peppy and vibrant and didn’t perform as good.

Checked sparks, compression,dynoed it etc all cane back well. However car got worse over time and performance fluctuates.

Car is lowered and it wouldn’t surprise me at all if garage got carried away and smashed the Center silencer on a speed hump - all garages do unless u take it to a performance specialist who deal with lowered cars often.

Anyway today I hit speed humps twice and that improved sound and performance a little. I’m wondering it it’s to do with the exhaust.

Now obviously I’m looking into other causes for problem(I think the poor running, difficulty shifting, quiet sound, stalling etc I’s part of the same issue) however I am wondering could the Center silencer which gets hit the most have had its insides damaged and could it get damaged to the point that it caused something like back pressure or something else which leads to Above symptoms?

On the other hand I’ve looked at pics of what a center silencer or muffler looks like and it seems to be Just metal pipes and walls - hard to see how anything can fall apart here before the exhaust itself falls off though
I did have a hanging exhaust for a while.

Thanks

Edited by SpeedySpeedBoy on Sunday 15th November 20:30

[SpeedySpeedBoy]

There is no check engine lights at present.