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      01-16-2013, 01:54 AM   #1
Drives: 2011 M3
Join Date: Sep 2011
Location: Toronto

Posts: 964
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Quietting down Akra Evo ...

Hey Guys,

I bought a used Akra Evo (full system) from a forum member here. While the sound is perfect at most RPMs. The Akra has a deep growl during idle (~800rpm). It also has a resonance at 1-1,200rpm. Parking underground is literally scary. The echo is insane. Has anyone tried adding additional resonators to quiet the Akra down a bit? Looking at the system, the very front section of the Akra might fit two resonators.

Any advice is appreciated.
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