With the G80 M3/G82 M4 BMW is doing something a little curious with the exhaust valve and not opening it all the way from factory. This means that even in Sport Plus mode you are not getting the full volume possible from the exhaust, even with an aftermarket one like the Remus we have fitted in this video!
There has been a few solutions but Awron have developed one that integrates with the car to utilise the OEM exhaust valve button meaning no clunky keyfob or additional switches. This also means you have full control of the exhaust valve 100% of the time.
In addition to this it can also disable the active sound design (fake exhaust through the speakers), stop/start and even delete the codes you would get from catless downpipes.
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