I filled out a survey and test vehicle info a month ago from Edelbroc Inc. in Torrance Ca. Apparently they are expanding to the exhaust systems. They finished the Ferd series and started on the Dodge. My '03 305/555 qualifies with them and they want to test a 4"(I thought I already had that) mandrel system with a "Titanium" type of muffler with less back pressure and a stainless extention. The best part is that it is free, with free upgrades in the future. I have an appointment Nov. 1st for the installation. Is anyone aware of this system and the sound it makes?