dgz32
04-23-2014, 01:49 PM
My muffler is apparently hollow—no baffling or any other material inside—and it's completely intact with no evidence of being opened up. Very strange. Anyway, it also drones like a mother at certain RPMs so I'm looking to switch it out with another factory muffler. Went to the parts yard today and all the 525s were rusted out. They did have a 1990 735i there and the muffler looked outstanding. It looked like it'd fit dimensionally—sans the slightly larger piping and longer tips. Not a huge deal. I go to pull it down and notice that the top of the muffler has a hump running the length of the back part where my 525 muffler does not. I do not have my car with me at the moment—does anyone know if the 735 muffler with fit? Seems like I remember someone doing this, but I think it was a 540 that it went onto.