# Preformance mufflers

**URL:** <https://forums.speedlife.net/t/preformance-mufflers/261026>\
**Category:** Shift518 Automotive\
**Created:** [October 25, 2011, 4:52pm UTC](https://forums.speedlife.net/t/preformance-mufflers/261026 "2011-10-25T16:52:32Z")\
**Posts on this page:** 1\
**Showing post:** 14

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**Author:** ![20wrx09](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/20wrx09/32/6532_2.png) [@20wrx09](https://forums.speedlife.net/u/20wrx09)\
**Post date:** [October 25, 2011, 7:38pm UTC](https://forums.speedlife.net/t/preformance-mufflers/261026/14 "2011-10-25T19:38:02Z")

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> [@At what point....](https://forums.speedlife.net/t/at-what-point/46220/27):
>
> dynomax with the flapper . I had that on my old civic

this, i have one on my wrx. although the valve got annoying at idle and deceleration since im unequal length headers and what not, so i welded it to stay open. but cruising and stuff like that it was dead quiet.

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