Originally Posted by Cadence
I am very interested in buying two of your filters.
-Do you have any before and after dynos (same car, same day)?
-People report a change in induction sound after installation. Why?
-What country is the filter manufactured in?
Here is a review/dyno from a forum member upgrading to the Macht Schnell filter: http://www.m3post.com/forums/showthread.php?t=271780
All filters are manufactured in the US. The change in sound is largely related to omitting the integrated charcoal liner in the stock filter, which is restrictive to ariflow.