Quote:
Originally Posted by LACSTER
There's a big difference in sound between the two. I really like the M5 much better it feels more open and does not stop back pressure. The sound is a lot tighter and louder as well. I opened up the vacuum hookup to open position and locked it so all pipes are working. When the vacuum was closed the sound was very close to the M6 exhaust.
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thanks! any drone with either setup? also did you remove secondary cats?