During normal cruising at say 80kmh I think mine is a bit more quiet with stage 2 (compared to OEM and stage 1). I wonder if it is because the turbos represent a higher resistance to the exhaust flow due to the increased boost?
I also wonder if the baseline boost is changed with the ESS tune?
It is really hard to be objective on these sound matters as wind and many other factors play in as well. But in any case, I believe that if you want a significant change in exhaust note, you better look at hardware upgrades instead.
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