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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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Old 06-14-2014, 01:06 PM
SDF SDF is offline
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Location: Dallas
Join Date: Jun 2014
Posts: 5
Mein Auto: 2009 M3
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.
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