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I just got a 2021 M550i a couple of weeks ago . Im waiting for the Dinan tune to be ready, as Im worried about warranty issues .
I did bring it to Atco and ran a 12.20 @119 mph. I only had three runs , Track was crowded and there were several breakdowns most needing a cleanup .Next time Im looking for high 11s.
If it wasnt for the Warranty I would ,get a non Dinan tune, remove catted down pipes, change exhaust and add a fresh air intake . Id like to get it into the 10s
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