Hey to all, i'm thinking about swapping my stock muffler for a staright pipe exhaust. My friend swapped his muffler for a pipe in his old Chevy Blazer. I was wondering how i could keep all the stock pipes but swap the muffler for a pipe. I need to know how to make a "muffler" out of a pipe. This is an odd question, but i would like to get any advice i could get. Thanks.