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      03-12-2018, 10:44 PM   #31
Dracon
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Drives: 2013 F10 M5
Join Date: Apr 2009
Location: Out and About

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2013 BMW M5  [0.00]
It sounds awesome without cats. I had my stock downpipe cats gutted when we installed the Armytrix system.

I love the exhaust, my only complaint was the control box requiring exclusive use of the OBDII port. I wound up capping off the vacuum lines and having the exhaust flaps open all the time (the default position is open when no vacuum is applied, the exact opposite of the stock exhaust).
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