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Old 12-04-2012, 11:52 AM   #2
be0tch
Scooby Newbie
 
Member#: 66206
Join Date: Jul 2004
Vehicle:
2005 WRX STi

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The STi axleback is the quietest. Source: I am running the STi axleback on my current green turbo setup.

People say the whisper may be quieter than the hush but both are noticeably louder than the STi axleback.
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