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      01-12-2013, 03:08 AM   #45
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Drives: E89 Z4 sDrive35is
Join Date: Jan 2013
Location: Netherlands

Posts: 33
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BTW what difference did you notice with the K&N air intake? Did you install it directly with the sec. cat replacement or did you do them one by one. Which difference did you notice from the one and the other?

I'm thinking of similar mods to my '10 Z4 35is which is now still stock, to make it sound a bit more. In the future I'll get custom software on it.