weird bmw muffler has some sort of fibre

[320ie36]

i noticed dark smoke coming out of my muffer 1994 bmw 320i so i took a closer look and seen some sort of cotton/fibre/insulatio or what ever hell it is does anyone know what this is and does it have something 2 do with me failing an e-test pleae reply............................................. .....

[bimmerjoe]

yea all mufflers have it! i cant explain what it is tho

[Manimillion]

What does it taste like?

[King Luis]

here's a pic of inside a stock m3 muffler.
http://img337.imageshack.us/img337/6614/attachmentoh3.jpg

[someguy]

im guessing it helps with the "muffling" or the sound:P

[Gamite]

sound dampening material

[JUS_CRZN]

What gamite said, but It has nothing do do with emisions

[MANDD]

Very typical with mufflers, (fiber)glass packing to reduce noise. It would only affect the emission test criteria on a visual inspection.

If the muffler was damaged or open as such, then they would not test the vehicle and issue a fail.

Mark.

[SamE30e]

Glasspack exhaust.

[320ie36]

thanks 4 everythin ur a big help and mark is my mech.........