M35i downpipe

Patrick · 05-02-2024, 06:35 AM

Has anyone added a downpipe to their m35i B48? I went for a drive in my mates supra with the b58 with downpipe and you can really hear that turbo noise. His only engine mod is a downpipe so I’m wondering if it would have the same affect the B48 car?

rice_rocket88 · 05-03-2024, 10:17 AM

I considered it but am a little bit lazy and budget oriented for the kids. I was thinking of changing the mid pipe first due to ease of doing it myself etc. I only know one person that did it and said it was double the exhaust noise and seemed to increase the boost naturally. No word on turbo noise .. but it should increase that. I'm in to hear if anyone is planning on doing it..

hooligan_G01 · 05-03-2024, 12:43 PM

Seems to me an intake would provide more audible turbo noises than a DP?

rice_rocket88 · 05-03-2024, 12:59 PM

The intake swap on the m35i doesn't really make more noise unfortunately. I'm thinking it's because of this internal wastegate design that's for this year/model. Even on our 2016 X1 all the turbo noises and flutters are much more noticeable than the m35i.

Usually when you get rid of the stuff in the downpipes/exhaust that's where you can hear the spool from the other end though...

05-02-2024, 06:35 AM	#1
Patrick Enlisted Member 40 Rep 37 Posts Drives: BMW 1 series 125i Join Date: Sep 2022 Location: Sydney iTrader: (0) Garage List 2019 BMW 1 Series 125i [0.00]	M35i downpipe Has anyone added a downpipe to their m35i B48? I went for a drive in my mates supra with the b58 with downpipe and you can really hear that turbo noise. His only engine mod is a downpipe so I’m wondering if it would have the same affect the B48 car?
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05-03-2024, 10:17 AM	#2
rice_rocket88 Major 303 Rep 1,087 Posts Drives: E60 F48 F39 Join Date: Mar 2019 Location: Boston iTrader: (0)	I considered it but am a little bit lazy and budget oriented for the kids. I was thinking of changing the mid pipe first due to ease of doing it myself etc. I only know one person that did it and said it was double the exhaust noise and seemed to increase the boost naturally. No word on turbo noise .. but it should increase that. I'm in to hear if anyone is planning on doing it..
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05-03-2024, 12:43 PM	#3
hooligan_G01 Space Shuttle Door Gunner 6430 Rep 5,312 Posts Drives: 2022 X3 M40i BG/Taco Red Join Date: Nov 2017 Location: Back in the Mitten iTrader: (1)	Seems to me an intake would provide more audible turbo noises than a DP?
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05-03-2024, 12:59 PM	#4
rice_rocket88 Major 303 Rep 1,087 Posts Drives: E60 F48 F39 Join Date: Mar 2019 Location: Boston iTrader: (0)	The intake swap on the m35i doesn't really make more noise unfortunately. I'm thinking it's because of this internal wastegate design that's for this year/model. Even on our 2016 X1 all the turbo noises and flutters are much more noticeable than the m35i. Usually when you get rid of the stuff in the downpipes/exhaust that's where you can hear the spool from the other end though...
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