Do exhausts change noise?

moleskn1

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Hi there I recently got a turbo back exhaust and it sounds awful, a bit like a tin can rattling and really loud.

My question is do they change noise as carbon builds up or anything?

Hopefully it gets more deeper :)
 
No, I was hoping that when I had my miltek system to my S4 years ago, and even after a few K miles it still sounded the same (had a drone noise around 70) only solution was was to put the stock system back on.
 
If you have a tin can rattle ld suggest there is a problem with one of the boxes, and have it checked by whoever installed it. Could be a damaged baffle.
 

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