I just recently added a badlanzhpe electric exhaust cutout to my 05 5.4L and I would just like to say the sound is awesome. I run a flowmaster 40series for when the valve is closed, but being able to open it up is awesome. I am new to this site so I am still trying to add some pics. Its raining today so I will try and get some next pretty day and post them.
Check out their site at badlanzhpe.com and they have plenty of videos on youtube under electric exhaust cutout.