chrispa

hello everyone i have a 2011 e63 and wanted to do straight pipe mufflers so i seen a video opening up the muffler and removing the fiber glass and putting a 2.5 inch stainless clamp over the perforated pipe to act like a straight pipe in the muffler, but noticed the little y pipe in the muffler. how does that escape or what roll does that play.

video of a diy on youtube