When we say extremely loud... does that mean deep loud? raspy loud? I have the full RPI GTM system and i sold my car for a e90... and if it compares to that it would be pretty loud but i would not think it would be as loud as a full GTM.
Current: 2013 E92 M3 AW DCT
Past: 2011 E90 M3 AW DCT, 2011 E92 M3 MR 6MT, 2008 E92 M3 AW 6MT