Come see what's inside a stock NBS dual inlet/outlet muffler
#15
I cut a single in single out one open from my 04. It looks worse inside than this one as far as restrictions go. I removed a few things and rearranged a few things inside and that helped out some. It has some sound to it, flows alright, but still fairly quiet. Much quieter than my dual slp loudmouth I's. After rocking this quiet system for the past year, I am about to throw my duals back on.
#16
I know this is an old thread but its an awesomeone with GREAT pictures.
I had asked a question in this thread: Pre 07 - Stock Tail Pipe - Silverado/Sierra 2500HD & 3500HD - GM-Trucks.com
I later found your thread and it was ICING on the CAKE.
I had asked a question in this thread: Pre 07 - Stock Tail Pipe - Silverado/Sierra 2500HD & 3500HD - GM-Trucks.com
I later found your thread and it was ICING on the CAKE.
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