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Huge question, what exactly do the valves do on the system. Eisenmann has a system with valves, but Nate at IND confirmed that their valves, which are controled by a remote, do not change the tone or volume of the exhaust.
I'm looking for a system that has a stock and sport (so to speak) mode.
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CPIGUY 
2017 Ferrari 488 Spider
2019 Tesla Model 3 Performance
2019 BMW X5 MSport, in coming |