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X3 F25 (2011 - current)
The latest X3 brings some added style and some new features to the BMW SUV family. Talk about the new F25 now!

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  #1  
Old 10-16-2013, 03:23 PM
ghostdog1108 ghostdog1108 is offline
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N55 Exhaust Variations

Still wondering why some models with the N55 engine come with single exhaust and others, dual?
Is it strictly a cost issue?
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Old 10-17-2013, 03:35 PM
ghostdog1108 ghostdog1108 is offline
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I take it no one else knows either?
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Old 10-17-2013, 06:40 PM
Big W Big W is offline
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single exhaust is for diesels
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Old 10-18-2013, 10:48 AM
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lbjgh lbjgh is offline
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I haven't seen an n55 equipped car with a single exhaust tip.
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Old 10-18-2013, 03:44 PM
ghostdog1108 ghostdog1108 is offline
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The double tip is just that, a double tip.
All X3's have a single exhaust system, both the 28i and the 35i.



Quote:
Originally Posted by lbjgh View Post
I haven't seen an n55 equipped car with a single exhaust tip.
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Old 10-19-2013, 09:36 AM
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Liverman Liverman is offline
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Quote:
Originally Posted by ghostdog1108 View Post
Still wondering why some models with the N55 engine come with single exhaust and others, dual?
Is it strictly a cost issue?
OK, I think you are asking "Why do some BMW models with a N55 engine have a dual exhaust and some BMW models with the N55 engine, like the X3 with the N55, have a single exhaust?"

Here is a Wikipedia article:
http://en.wikipedia.org/wiki/BMW_N55
Apparently there are two variants of the N55. Do your single/dual exhaust models correlate with the models that have the different variants?

If not, then I would have to say single/dual exhaust is a styling choice and not an engineering design choice.
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Old 10-19-2013, 10:54 AM
ghostdog1108 ghostdog1108 is offline
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yes it's exactly what I'm asking.
The 35i N55 engine in the X5 is exactly the same as the one in the X3 yet it has dual exhaust.
This leads me to the conclusion that it's a money saving decision.
Almost all X3 owners would prefer dual exhaust if it was available.






Quote:
Originally Posted by Liverman View Post
OK, I think you are asking "Why do some BMW models with a N55 engine have a dual exhaust and some BMW models with the N55 engine, like the X3 with the N55, have a single exhaust?"

Here is a Wikipedia article:
http://en.wikipedia.org/wiki/BMW_N55
Apparently there are two variants of the N55. Do your single/dual exhaust models correlate with the models that have the different variants?

If not, then I would have to say single/dual exhaust is a styling choice and not an engineering design choice.
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Old 10-19-2013, 12:14 PM
TerraLvr335i TerraLvr335i is offline
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Just a guess, but it might also have to do with routing/space under the car. Maybe the X3 and others where the N55 exhaust has dual tips together on one side of the car have components in the way that prevent easy routing of one of the tips to the other side?

Or, like someone else said, maybe it's just cost cutting, although I'm not sure why BMW would choose that type of cost cutting on one model and not others (even some that are cheaper).
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Old 10-19-2013, 02:36 PM
ghostdog1108 ghostdog1108 is offline
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That's a possibility but with German engineering skills it would be a poor excuse.
It actually doesn't make much sense.
There are many inferior cars out there that have dual exhaust.

For what it's worth the X3 is a great automobile regardless!





Quote:
Originally Posted by TerraLvr335i View Post
Just a guess, but it might also have to do with routing/space under the car. Maybe the X3 and others where the N55 exhaust has dual tips together on one side of the car have components in the way that prevent easy routing of one of the tips to the other side?

Or, like someone else said, maybe it's just cost cutting, although I'm not sure why BMW would choose that type of cost cutting on one model and not others (even some that are cheaper).
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