Quote:
Originally Posted by spool twice
this sounds terrible, even considering that it's an i6...The N54/N55 sound substantially better; they actually change in pitch as you rev it. The S55 sounds flat when you rev it, there isn't a change in pitch as you rev it, just a change in volume (sound). There is nothing sporty about this sound; sounds boring and lazy.
With that being said, a secondary cat delete makes the N54 sound better, lets hope the S55 will sound better with a cat delete. An aftermarket muffler just changes the volume of noise, it won't get rid of that boring and lazy sound.
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I am not saying the exhaust sounds bad, but I don't think a person should have to "cat delete" after spending $80,000 for an M3. Also do remember the consequences of deleting cats when it comes to emissions and lease returns. You have to put them back, a lot of work. Who is going to do all of that?