Originally Posted by joet@raceprecision.com' post='731448' date='Nov 25 2008, 09:38 PM

We had hollywoodtrash's 2007 550i in for a brief look last week. Unfortunately, the 550i has the same problem as the 545i due to the location of a weld on the exhaust pipe behind the box resonator. Instead of using the existing RPI M5 muffler, we would need to start from scratch a new project. A decision hasn't been made whether we will go forward with the project.