Quote:
Originally Posted by JerryVH
. Good question. Quite sure it is all settings. Typically drive in Sport+. But I will double check that sound is in all.
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ok great, let us know. May be something to do with the valves opening and closing. If it does it in efficient mode then there could be some sort of leak. If shouldn't have drone in efficient mode. I don't get any and I have straight pipe set up, but valves open I do without a doubt