MFER-1 Active Exhaust kit install on 2017 Dodge Charger Srt392.
I purchased because a about a month ago I started to experience a loud rattle coming from the passenger side exhaust. Valve was stuck closed due to a faulty actuator (Code P121B). Instead of spending $400+ for a new one I decided to give this a try. I recommend if you're having similar issues or simply want the valves open at all times
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