If this is N52 in your Z4 then it's a very common mod in 1 series and 3 series community.
https://www.e90post.com/forums/showthread.php?t=372973
and actually here
https://www.zpost.com/forums/showthread.php?t=455180
PS: I haven't done this myself (yet) but researched a lot in this direction. But since this is my wife's car she keeps not approving this spending
