Well the title says it all. Once the smarty comes out and the bungs in the exhaust are no longer needed I am wanting to swap out my 4" turbo back system to a 5.9l kit for a 5" turbo back to a single miter cut stack behing the passenger side. Who knows of or has the best deal for what I want. ( and how does everyone think it will look) Also, which do you recommend, the 7" or the 8". there arent many if any people around me running a single stack so i really have nothing to compare it to, or anything to look at in person to see which I like best.