The muffler was perfect for my application. I chose this version because it had no filling in the silencer. Barriers are simply welded in. I actually installed this muffler as a muffler replacement on a Porsche 912E with a Bursch unit on the car. I cut out the old muffler and widened one end of the muffler and it fitted perfectly. I installed stainless steel T-clamps to facilitate further maintenance.