Thread: Exhaust Valve Controllers, Do they Actually Make The Exhaust Louder?
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      07-17-2023, 12:10 PM   #28
Autoaddict
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Drives: 2008 BMW 328xi Sportwagon, G80
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I have a mid pipe and I had the SST valve controller installed today and with it 100% or even 50% open, this thing is loud! Has way too much drone for me, honestly.
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