# Mufflers

**URL:** <https://community.cartalk.com/t/mufflers/20301>\
**Category:** Maintenance/Repairs\
**Created:** [October 3, 2008, 10:03pm UTC](https://community.cartalk.com/t/mufflers/20301 "2008-10-03T22:03:45Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![cprice6060](https://avatars.discourse-cdn.com/v4/letter/c/a6a055/32.png) [@cprice6060](https://community.cartalk.com/u/cprice6060)\
**Post date:** [October 3, 2008, 10:03pm UTC](https://community.cartalk.com/t/mufflers/20301/1 "2008-10-03T22:03:45Z")

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I have what looks to be long strings of fiberglass coming out of the tail pipe of my 94 Mazda (only 54k miles). I assume this is part of the muffler coming apart. Is it safe to drive this way (i.e., worried about exhaust backup) or should I replace it.

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [October 3, 2008, 10:14pm UTC](https://community.cartalk.com/t/mufflers/20301/2 "2008-10-03T22:14:59Z")

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That’s the insulation from inside the muffler coming out. Should you replace the muffler? Well yeah! It’s coming apart on the inside.

Tester

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**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\
**Post date:** [October 3, 2008, 10:34pm UTC](https://community.cartalk.com/t/mufflers/20301/3 "2008-10-03T22:34:17Z")

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Tester’s right, but it’s not an emergency - if you feel a strong flow of exhaust out the pipe, you’re not clogged up. Also, get a good quality replacement, the super cheap ones can hurt mileage.