goldwing2000
OG Mazda Mafia
- :
- 2004 Mazda3s Hatch; 346,000 mi (sold)
2024 CX-5 CE; 7,500 mi (so far)
tsunami said:i thought it was just a piece of steel welded over the actual exhaust pipe to give a different sound (deeper) then with out it.
Well... what do you think a muffler does?

But no, it's not just a piece of steel welded over the pipe. It's a separate component that is specifically designed to change the sound of the exhaust. Not necessarily a deeper tone, just a different sound. Usually to smooth out something or another that some focus group decided didn't sound good.