Which muffler should I use for my stack setup. I am currently straight piped and love the sound, but it would probably be too loud in stacks version. Also, I want to upgrade my turbo down pipe to 4-5" for egt reduction.

Thanks! :ro)

Oops! Wrong forum folder! Mackin, could you move it to the "accessories" folder?

Thanks!

They are much louder. I am currently running a 4" strait pipe, did have dual 5" stacks on which were louder in the cab. I would just get a 4 or 5" muffler and run it before the stacks under the truck.