Driving in sport mode all the time
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The Best of Mercedes & AMG
If you have a 3rd party warranty then you have a little bit more of an option, basically anything that makes your car appear stock still most inspectors won't know the difference, and exhaust isn't covered by 3rd party warranties anyway so with some providers you can have a full custom exhaust and they wont care, but I heard others do.
Only reason I haven't done anything to my transmission is because the 65 AMG Transmission isn't like the 45/55/63 Amg trans, the 65 Trans can withhold up to 900 lbs of tq


