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View Full Version : weird bmw muffler has some sort of fibre


320ie36
03-09-2008, 07:46 PM
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
03-09-2008, 08:03 PM
yea all mufflers have it! i cant explain what it is tho

Manimillion
03-10-2008, 12:56 AM
What does it taste like?

King Luis
03-10-2008, 09:22 AM
here's a pic of inside a stock m3 muffler.
http://img337.imageshack.us/img337/6614/attachmentoh3.jpg

someguy
03-10-2008, 09:27 AM
im guessing it helps with the "muffling" or the sound:P

Gamite
03-10-2008, 01:48 PM
sound dampening material

JUS_CRZN
03-10-2008, 08:33 PM
What gamite said, but It has nothing do do with emisions

MANDD
03-11-2008, 08:16 AM
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
03-11-2008, 04:19 PM
Glasspack exhaust.

320ie36
03-12-2008, 09:40 PM
thanks 4 everythin ur a big help and mark is my mech.........