Searched here and read through the manufacturers' pages until I'm cross-eyed without finding what I'm after.
Looking for an exhaust system that will work with a manual transmission but don't want to stay at 3" down pipe like some systems come with. Most do not seem to give DP diameter at all. See a lot of "auto trans only" products.
What are the exhaust options for trucks with the ZF6 that have reasonable down pipe diameter? Do the AT systems work with some hammer love? I can't believe that this hasn't been covered, maybe I'm just too tired to find it.