Your located close to Comptechs facility, I'm envious. Let me know how that LSD turns out if you go through with it. As for the Comptech catback I thought it was going to be loud, but it really isn't at all. Once I hit three thousand rpm it lets out a sweet exhaust note.
I took my grandmother on a highway trip in my car and if it was remotely loud she would have let me know about it. She didn't even notice, and yes her hearing is just as good as mines.