I am sure people here have. I am a big on doing science when doing car mods. Just thinking that changing something with improve performance is wishful thinking. Personally on cars, boats, and airplanes I prefer quite. I do love the sound a bad ass jet or plane, however I enjoy them from afar and not in the cockpit.

I found a great thread on reddit that goes into this subject and this is the best quote yet:
DR exhausts and intakes are mother****ing science. You better be sure that you know science better then the guy who made it in the first place, if you want to make your exhaust make more power.
https://www.reddit.com/r/MechanicAdv...pros_and_cons/