Quote:
Originally Posted by Orange_m340i
Quote:
Originally Posted by bimmer456
It is closed in comfort mode. If you put it in sport it will eventually open up once it is warmed up. At least on the F30. Maybe it just needs to be warmed up in comfort for it to open on G20. Its to allow the cats to come up to temp more quickly to meet emissions regs. It will also sound louder and more aggressive.
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Makes sense! |
I believe if you rev it past 4K in comfort it also opens temporarily. Makes for a nice sounding exhaust note when it growls and barks as it revs past 4K but then closes below it, which eliminates drone that can happen in sport mode. Sometimes I drive like this with stick to the left so it revs past 4K more often on accelerating from a standing start or rolling start, or you can shift manually.