who makes a turboback system for our cars? has anyone tried one, with what gains to be expected? im planning on having my car tuned in the next week but wondered if i should hold off if a turbo back exhaust will require a re-tune.

 

please see the live mod list below:

https://www.evolutionm.net/forums/09...-mod-list.html

UR, AMS and others make them; no re-tune required.