Confused about kernel extensions

Question

I've learned two things about kernel extensions from Google searches:
1. Kernel extensions are stored in System/Library/Extensions
2. You can list all Apple extensions with the Terminal command kextstat and all third party extensions with the command kextstat | grep -v com.apple.
But something doesn't add up: the files listed by the kextstat command all begin with "com.apple". No files in System/Library/Extensions begin with "com.apple". In fact, none of the kernel extensions listed by the kextstat command seem to reside in System/Library/Extensions. So where are they?

Answer 1

I have the following result with the terminal command kextstat
Index Refs Address            Size       Wired      Name (Version) <Linked Against>
  111    0 0xffffff7f80b71000 0x5000     0x5000     com.Cycling74.driver.Soundflower (1.6.6) <101 5 4 3>
  126    0 0xffffff7f820f4000 0x3000     0x3000     com.bresink.driver.BRESINKx86Monitoring (9.0) <5 4 3>
I found the Soundflower driver in /System/Library/Extensions/
But ccould not find the other one BRESINKx86Monitoring anywhere .
where is it hidden?