question my dual exhaust went to crap after two winters in wisconsin and i just pulled it off so basically where the stock muffler started my exhaust pipe ends so the only back pressure is what i get from the stock cats and that silencer/resinator thing after the cat. how bad is it to run my truck with no muffler is the question? it sounds pretty good and it doesnt feel like it is any weaker or slower so what problems could i really have. thanks in advance.

 

it will be fine, the converters give it enough back presure. A glass pack is just a hollow pipe and that is what you still have so don't worry about it.

 

I did this while installing my muffler, it sounds pretty nice. Maybe you can get some audio clips, I posted one when I did this, the link is in my sig.