04 liberty gt exhuast do I need a tune?

Hi everyone.
I'm new to this forum and have just purchased my first turbo liberty. It's the twin scroll 2l turbo.
Does anyone know if I need a tune when changing just the rear mufflers to strait through ones or a cat back or full turbo back exhuast. And witch would be the best cost effective/ best sounding?
Any help would be awesome
Thanks
Drew
I'm new to this forum and have just purchased my first turbo liberty. It's the twin scroll 2l turbo.
Does anyone know if I need a tune when changing just the rear mufflers to strait through ones or a cat back or full turbo back exhuast. And witch would be the best cost effective/ best sounding?
Any help would be awesome
Thanks
Drew