550I exhaust flattened portion

NAVYPB · 01-23-2014, 04:17 PM

Was thinking about getting a 1014 550i. I was looking at the exhaust and does anyone know why before the mufflers the exhaust pipes are flattened a bit. I looked at the M5 and it was not?

I copied a pic from internet to show what I mean...

thank you

SocalBM · 01-23-2014, 05:15 PM

Noise and/or flow reduction? It's not for clearance because there's plenty of room for full 3" pipes.

combatbmw · 01-23-2014, 05:45 PM

wow good find, is this really true!?

scott135i · 01-23-2014, 05:51 PM

It's true... its some bs about clearance... the m5 doesn't have it.... supposedly their airflow volume is still the same, I'm just not sure how. I had them removed when I installed my M5 mufflers.

There are other similar bends up further towards the engine... keep looking.

bake · 01-23-2014, 06:00 PM

I thought I read somewhere it was for noise reduction.

NAVYPB · 01-23-2014, 07:08 PM

That is a bummer...seems like it would restrict flow and more towards the motor... I am very close to purchasing...I guess I know the first thing I am going to do...

combatbmw · 01-23-2014, 09:30 PM

There's no doubt that will cause restriction. I mean it's common sense.

NAVYPB · 01-23-2014, 09:39 PM

I agree with you Combat

scott135i · 01-24-2014, 08:58 AM

Quote:

Originally Posted by NAVYPB

I agree with you Combat

I would tend to agree too, but the shop who did my exhaust work, who builds mandrel bent tig welded stuff says the total volume flow through is the same, however the bends force the airflow to slow down speed due to change in direction to accomodate the bends.

01-23-2014, 04:17 PM	#1
NAVYPB Private 13 Rep 57 Posts Drives: 2016 X5;1991 M5 Join Date: Jan 2013 Location: Bay Area iTrader: (0)	550I exhaust flattened portion Was thinking about getting a 1014 550i. I was looking at the exhaust and does anyone know why before the mufflers the exhaust pipes are flattened a bit. I looked at the M5 and it was not? I copied a pic from internet to show what I mean... thank you Attached Images
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01-23-2014, 05:15 PM	#2
SocalBM First Lieutenant 179 Rep 348 Posts Drives: Porsche GT3 Join Date: Nov 2013 Location: Houston iTrader: (0)	Noise and/or flow reduction? It's not for clearance because there's plenty of room for full 3" pipes.
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01-23-2014, 05:45 PM	#3
combatbmw Major 206 Rep 1,250 Posts Drives: 20' X3M CP Join Date: Oct 2013 Location: SoCal iTrader: (2) Garage List 2017 GMC Sierra All ... [0.00] 2015 BMW M5 [8.75]	wow good find, is this really true!? __________________ 2020 X3M CP - IND Reflector set \| Ceramic Tint Retired:2015 M5 CP MSR Intake\|Carbon Fiber Fender Vents\|Meisterschaft GTC catback with LXR mid pipes and ER Catless DPs \| BPMSPORT Stage II Tune \| RKP Rear Diffuser and Challenge Center piece \|RKP Front Lip\| Painted Reflectors \| H&R Springs \| Strasse SM5R Carbon Fiber Wheels \| Nitto R888 \|
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01-23-2014, 05:51 PM	#4
scott135i Colonel 355 Rep 2,080 Posts Drives: 2020 X5 M50i Join Date: Feb 2009 Location: NYC Metro iTrader: (12)	It's true... its some bs about clearance... the m5 doesn't have it.... supposedly their airflow volume is still the same, I'm just not sure how. I had them removed when I installed my M5 mufflers. There are other similar bends up further towards the engine... keep looking.
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01-23-2014, 06:00 PM	#5
bake Colonel 602 Rep 2,194 Posts Drives: 2011 F10, 2013 E93 Join Date: Apr 2010 Location: New York iTrader: (9)	I thought I read somewhere it was for noise reduction. __________________ *Bake* 2011 Alpine White on Black 535i M-Sport 2013 Space Gray on Fox Red M3 Vert
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01-23-2014, 07:08 PM	#6
NAVYPB Private 13 Rep 57 Posts Drives: 2016 X5;1991 M5 Join Date: Jan 2013 Location: Bay Area iTrader: (0)	That is a bummer...seems like it would restrict flow and more towards the motor... I am very close to purchasing...I guess I know the first thing I am going to do...
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01-23-2014, 09:30 PM	#7
combatbmw Major 206 Rep 1,250 Posts Drives: 20' X3M CP Join Date: Oct 2013 Location: SoCal iTrader: (2) Garage List 2017 GMC Sierra All ... [0.00] 2015 BMW M5 [8.75]	There's no doubt that will cause restriction. I mean it's common sense.
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01-23-2014, 09:39 PM	#8
NAVYPB Private 13 Rep 57 Posts Drives: 2016 X5;1991 M5 Join Date: Jan 2013 Location: Bay Area iTrader: (0)	I agree with you Combat
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