# truck exhaust flappers

**URL:** <https://boards.straightdope.com/t/truck-exhaust-flappers/223352>\
**Category:** Factual Questions\
**Created:** [January 8, 2004, 3:03am UTC](https://boards.straightdope.com/t/truck-exhaust-flappers/223352 "2004-01-08T03:03:10Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Berkut](https://avatars.discourse-cdn.com/v4/letter/b/a88e57/32.png) [@Berkut](https://boards.straightdope.com/u/Berkut)\
**Post date:** [January 8, 2004, 3:30am UTC](https://boards.straightdope.com/t/truck-exhaust-flappers/223352/3 "2004-01-08T03:30:49Z")

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Around here they are called “weathercaps”. They keep rain out.

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