Exhaust Question

jwduffett · 01-31-2019, 02:09 PM

Just was wondering why on my new (used 2014) X5, I have noticed when its cold outside below 30 degrees that I only see exhaust fumes coming from the driver side pipe. I see that its not a true dual exhaust but that it is one pipe from the manifold and then hits a muffler at the back and then branches to two pipes out the back bumper. Also evidence that the right side pipe gets more action because it is much more dirty with exhaust soot and when I put my hand over the passenger side I hardly feel any air coming out.

Thanks

BimmerTy · 01-31-2019, 02:24 PM

Please

On the 35i there is a flap in the other pipe that opens up at a certain RPM. It's closed for back pressure at low RPM torque.

jwduffett · 01-31-2019, 02:44 PM

Makes since, Thank you!

Kzang · 01-31-2019, 02:46 PM

But if you want both to flow at all rpms then you will need MPE.

jwduffett · 02-01-2019, 01:11 PM

What is MPE?

DuSh · 02-01-2019, 01:28 PM

Quote:

Originally Posted by jwduffett

What is MPE?

M Performance Exhaust - it's a exhaust that BMW sells as an upgrade for those who want a bit more growl and sporty tone out of their exhaust. IMHO the best exhaust option for 35i (expensive, but imho worth it)

unluky · 02-01-2019, 02:03 PM

Quote:

Originally Posted by Kzang

But if you want both to flow at all rpms then you will need MPE.

Or get a app that will open it for you like Bimmerlink.......etc

Kzang · 02-01-2019, 02:13 PM

Quote:

Originally Posted by DuSh

Quote:

Originally Posted by jwduffett

What is MPE?

M Performance Exhaust - it's a exhaust that BMW sells as an upgrade for those who want a bit more growl and sporty tone out of their exhaust. IMHO the best exhaust option for 35i (expensive, but imho worth it)

I'll add mine too to demonstrate both exhaust opening up

01-31-2019, 02:09 PM	#1
jwduffett New Member 7 Rep 14 Posts Drives: 2013 X3 x28i and 2014 X5 Join Date: Jan 2018 Location: TN iTrader: (0)	Exhaust Question Just was wondering why on my new (used 2014) X5, I have noticed when its cold outside below 30 degrees that I only see exhaust fumes coming from the driver side pipe. I see that its not a true dual exhaust but that it is one pipe from the manifold and then hits a muffler at the back and then branches to two pipes out the back bumper. Also evidence that the right side pipe gets more action because it is much more dirty with exhaust soot and when I put my hand over the passenger side I hardly feel any air coming out. Thanks
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01-31-2019, 02:24 PM	#2
BimmerTy ///M 194 Rep 272 Posts Drives: 2015 F15 X5 50i M Sport Join Date: Sep 2018 Location: RVA iTrader: (0) Garage List 2015 BMW X5 xDrive50i [0.00]	Please On the 35i there is a flap in the other pipe that opens up at a certain RPM. It's closed for back pressure at low RPM torque. __________________ 2015 F15 X5 xDrive50i - M Sport - Space Grey Metallic - 21" 612M - Accelera Iota ST68's - Black Dakota - Leather Dash - Poplar Wood - Ceramic - Shawdowline - Anthracite - Adaptive M - Full LED - Executive - DA+ - Surround - HUD - Enhanced BT - Soft Close - B&O - ACC Stop & Go - Multi Contour - 4 Zone Climate - Comfort Seats - Cold Weather - Muffler Delete - Akrapovic Tips - F85 Grille - 35% Tint - BMW All Weather Mats -- Missing DHP, NV, Active Steering, Rear Entertainment, & Cooled Seats
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01-31-2019, 02:44 PM	#3
jwduffett New Member 7 Rep 14 Posts Drives: 2013 X3 x28i and 2014 X5 Join Date: Jan 2018 Location: TN iTrader: (0)	Makes since, Thank you!
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01-31-2019, 02:46 PM	#4
Kzang Major General 3243 Rep 5,066 Posts Drives: 2015 X5 35i Msport SG Join Date: Jun 2009 Location: East Coast iTrader: (0)	But if you want both to flow at all rpms then you will need MPE. __________________ 2015 F15 X5 35i Msport Space Grey M Performance parts MPPK, MPE
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02-01-2019, 01:11 PM	#5
jwduffett New Member 7 Rep 14 Posts Drives: 2013 X3 x28i and 2014 X5 Join Date: Jan 2018 Location: TN iTrader: (0)	What is MPE?
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Exhaust Question