Quote:
Originally Posted by POMFKIMOCHI
If you have just a midpipe, the drone won't be too noticeable, but it's definitely there, and is exacerbated by removing the cat and muffler as well. Dinan did well for they did with the acoustics design but you cannot simply eliminate a frequency without proper baffling or an extra chamber (helmholtz/j-pipes basically)
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This is what I was thinking as well, because I bought a muffler delete advertised as "zero drone" on my Lexus IS and the drone was horrific. I really want to ride in an M240i with a Dinan midpipe or a resonator delete before committing to it I think. Did you modify your exhaust?