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      02-13-2016, 06:15 PM   #52
Artemis
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Drives: BMW M2 Competition
Join Date: Jun 2011
Location: Belgium

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For the record: excerpts from the interview with BMW representatives at SEMA 2015 regarding the M2 M Performance Exhaust:
Q: Any power gains from the M Performance Exhaust?
A: Few gains should be expected just from changing axle back exhaust on a turbocharged BMW because
1) the main restrictions are in the two catalytic converters, which are retained with an axle-back exhaust and
2) no gains should be expected without remapping the ECU because the ECU is always correcting, so for example if the car loses backpressure, the ECU will reduce power.
Q: How do valves operate on the M Performance Exhaust?
A: Valves are solely driver-controlled using an included bluetooth remote (see photo of exhaust remote from a MINI, which the M2 remote will resemble). The exhaust valves do not automatically open or close at a certain RPM.
[From Jason: the remote may come in packaging which should fit in the cupholder to act conveniently as a remote holder].
Q: Does the M2 M Performance Exhaust use the same tips as the M3/M4 MPP exhaust?
A: Yes, they are interchangeable.
(source: here)

Q: What are the technical specs on the M2 exhaust system?
A: The material is going to be stainless steel and you will be able to choose between carbon fiber tips and titanium tips. But the construction will be stainless steel for cost reasons. The tips will also be interchangeable between M3 and M4 exhaust systems. There will be no power gains with an axle-back exhaust because the turbocharged engine will compensate to create the same amount of torque. It would be different with a naturally-aspirated engine, but not with the turbocharged engine.
(source: here)
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