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Old 04-05-2019, 09:37 AM
ctorrey ctorrey is offline
Porleau
Location: Boston
 
Join Date: Mar 2007
Posts: 1,473
Mein Auto: 2017 BMW 340xi M-Sport
I have a '17 340xi with port installed M Performance Power & Sound Kit. I don't believe there is any power gains with the exhaust alone (obviously the 'Power' part of the kit gets you another ~35hp/39tq). Anyway, I have found that in 'Comfort' mode the exhaust is just a little more throaty than stock. When in 'Sport' mode, you get the burbles and popping on overrun conditions. It's also significantly more throaty. In no way is it as raucous as modern muscle cars (e.g., high performance Mustangs and Camaros), but it does add a little more personality to the typically sedate B58 engine and exhaust.

I believe the experience you would have with the N55 engine is similar. If it were my money, I would go with the MPPK kit for the N55 which gives you some actual performance gains. I had this in my previous '14 335xi and you do get some of the burbles and pops in Sport mode - even without the M Performance exhaust.
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ChuckieT

2017 340i xDrive | Mineral Gray | Coral Red Dakota | M-Sport | M Performance Power & Sound | ZCW | ZDA | ZLP | 2PE | 2VF| ZTP | 5DL | 5DP | 6CP
2017 X3 2.8 xDrive | Deep Sea Blue | Saddle Brown Dakota | ZXD | ZW2 | ZDA | ZLP | ZP3 | ZTP | 5DL


Gone, but not forgotten:
14 BMW 335xi F30
11 BMW 335xi E90
08 BMW 335i E90
05 Audi A4 3.0q USP
01 Audi A6 4.2q
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91 BMW 535i
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