E92 exhaust heat shields
Newbie here. I replaced my stock exhaust system with an aftermarket custom catback exhaust. It is engineered to be a direct replacement.
The installation is complete and the sound is just what I was looking for. Did not do it for the 15 hp boost.
Now, examining the stock exhaust system I see where BMW has tacked on an extra heat shield near the differential on both sides. It truly looks like a bandaid the size of a elbow pad riveted into the pipe.
None of the other direct replacement systems for the E92, such as Borla, Akrapovic, Corsa, et al have that extra tack-on piece.
Any thoughts as to the necessity of that extra insulation around the pipe? Could the same insulating effect be achieved with a wrap of some sort around the pipe, or is that even necessary?
Any thoughts welcome.