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      05-01-2012, 02:30 PM   #11
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Drives: 2013 E93 M3, Jerez Black
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Originally Posted by MiamiE93Vert View Post
A question on this, "It sounds great too, I think a cross between the Akrapovic Evolution and the Eisenmann Sport." How would you compare the closed valve volume of the Evolve exhaust in comparison to these two systems?

I'd say it's pretty similar. The Evolve has a bit of a noise spike, similar but narrower in RPM band, to the Eisenmann Sport with a primary cat delete. The Akrapovic Evolutionis a little bit quieter at 1900 rpm, but louder pretty much everywhere else, except over 6000pm (where they are about the same).