2 90 degree pieces clamped in where the muffler used to be. I need to redo it because I have a slight leak because I over expanded one piece. Had all the stuff to do it with at the shop. Just had to get the elbows and clamps. Torched the muffler out. Cut the hanger off. Need to weld the hanger on the new piece yet. Good sound difference. Minimal change in performance. Lets you know what the engine is doing. Would not have noticed the tranny slip if it weren't for the sound difference.