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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > N55 3" DP & exhaust.



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      03-22-2011, 01:28 AM   #1
Keik E92 M3
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N55 3" DP & exhaust.

I was just thinking about DP and exhaust and i am curious as to why a company hasn't made a straight 3" DP to 3 " exhaust for the n55?

Why do u we making these two outlet downpipes and exhaust? I would think a single straight 3" DP alone to a single 3" exhaust to a dual setup will do just fine...
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      03-22-2011, 01:48 AM   #2
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Quote:
Originally Posted by keikdasneak View Post
I was just thinking about DP and exhaust and i am curious as to why a company hasn't made a straight 3" DP to 3 " exhaust for the n55?

Why do u we making these two outlet downpipes and exhaust? I would think a single straight 3" DP alone to a single 3" exhaust to a dual setup will do just fine...
Well I think a company would have to make both the downpipe and exhaust. Fitment would be a bitch otherwise...
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      03-22-2011, 07:22 AM   #3
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That's a great idea. Local exhasut shop could do the whole job for 1500. 1000 for a dump pipe...... come on.
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      03-22-2011, 10:33 AM   #4
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This is true but with us having the procede/tune plus mods, the flow rate on a 3 inch or a 3.5 inch really makes minimal difference for the twin scroll turbo. And when we add meth, fmic, and nitrous the 3.5 inch will hold plenty.
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      03-22-2011, 12:04 PM   #5
Keik E92 M3
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I have a exhaust shop that will make me a DP and full exhaust for $400.00 bucks. Should i ask them to make 3" or 3.5?
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      03-22-2011, 12:05 PM   #6
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Quote:
Originally Posted by keikdasneak View Post
I have a exhaust shop that will make me a DP and full exhaust for $400.00 bucks. Should i ask them to make 3" or 3.5?
3.5 all the way back.
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      03-22-2011, 12:09 PM   #7
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Quote:
Originally Posted by shockin330i View Post
3.5 all the way back.
I am going to take the car in today and talk to them...


My idea exhaust is to get 3.5 all the way to a electric cut out area. then the rest can be stock exhaust piping to the stock muffler and tips. Maybe find some way to add a cat or something to the back to get rid of the smell.
Then when i want to open her up i have the electric cut out for fun times..
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      03-22-2011, 03:23 PM   #8
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