I have an 06' as well and my exhaust is starting to show it's age. I would love to put something a bit louder in as well, but i have two concerns.

1. I don't want to have to lose the spare tire.

2. I don't want the "helicopter under water" sound with the MDS system. (And no, i don't want to shut the system off either).

Do any systems exist that sound great and do not have the issues above?