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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 > AR Downpipe Catted 5" N55



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      05-07-2012, 05:25 PM   #1
BMW_Belgier
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AR Downpipe Catted 5" N55

Hello Guys (and Ladies)

Has somebody experience with this:

http://www.ardesign.info/store/bmw/e...-n55-2011.html

Thanks for your Answers!!!
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      05-07-2012, 05:37 PM   #2
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No experience with it but AR makes quality stuff. I'd be interested in hearing from someone that's running this - having some extra power and not failing out on emissions is kinda appealing to me.
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      05-07-2012, 05:44 PM   #3
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Speedy answer Thanks!

I live in a country that is very strict concerning emissions. Cattless is no option for me

I read already about the quality of AR products. Wondering if somebody is driving with this dp...
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      05-07-2012, 06:13 PM   #4
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5 inch?
Wow, there was another 5 inch DP somewhere else.
I don't think there was much gain versus the 3.5 or 4 inch, but definitely a plus to be able to pass emissions and get substantial gains.
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      05-07-2012, 06:21 PM   #5
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Performance boost isn't what you'll see from a catless but the sound is awesome and it lets the turbo spool much quicker and louder. If you have a JB4, you can run it in map 2 with this downpipe and 93 octane. Definitely a step up from the stock DP.
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      05-07-2012, 06:24 PM   #6
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I want this...but soooo much $$$$$
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      05-07-2012, 06:28 PM   #7
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SpartanGA: Get it and let me know how it works
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      05-07-2012, 07:02 PM   #8
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Quote:
Originally Posted by mashimarho View Post
5 inch?
Wow, there was another 5 inch DP somewhere else.
I don't think there was much gain versus the 3.5 or 4 inch, but definitely a plus to be able to pass emissions and get substantial gains.
that would be CP-E big boi dp.


Quote:
Originally Posted by BMW_Belgier View Post
Hello Guys (and Ladies)

Has somebody experience with this:

http://www.ardesign.info/store/bmw/e...-n55-2011.html

Thanks for your Answers!!!
BMW_Belgier
ur an xi, u got cat's on ur midpipe -
get'n hiflow cats on ur DP maybe more work
than u may want to do.
performance wise u may gain very little.

i say cut ur cats on the midpipe
or fabricate straight pipe for mid section
- so when u need to get inspection
u can slap on the cat'd mid section.
should gain atleast 10-15whp with 2ndary cats gone.
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      05-07-2012, 07:17 PM   #9
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Thanks FrankieE90!

Problem here is the Police... So it has to be more or less legal! They are brutally efficient here...
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      05-07-2012, 07:22 PM   #10
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Quote:
Originally Posted by BMW_Belgier View Post
Thanks FrankieE90!

Problem here is the Police... So it has to be more or less legal! They are brutally efficient here...

if they're brutal -
i say keep ur DP stock.
and go for a tune.
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      05-07-2012, 07:48 PM   #11
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Quote:
Originally Posted by FrankiE90 View Post
that would be CP-E big boi dp.


http://www.e90post.com/forums/showthread.php?t=595180

Yep! =)
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      05-07-2012, 09:32 PM   #12
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I have had personal experience with AR and have their catless dp. Great company and product
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      05-07-2012, 11:59 PM   #13
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I installed my AR Design 5" race catted downpipe last week. In combination with the BMW performance exhaust, it's kind of loud got a lot of thumbs up since I did this mod!
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      05-08-2012, 04:25 AM   #14
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Anothere belgian here

You had the PE exhaust before and it got louder or you got PE and DP at the same time? Any noticable performance gains?
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      05-08-2012, 10:47 AM   #15
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Quote:
Originally Posted by BMW_Belgier
Anothere belgian here

You had the PE exhaust before and it got louder or you got PE and DP at the same time? Any noticable performance gains?
I ordered the BMW performance exhaust when I ordered my car, so I never heard the original exhaust. It is LOUDER especially cold starts !
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      05-08-2012, 02:51 PM   #16
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Shouldn't a catted dp be less loud as a cattless dp?
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      05-08-2012, 06:08 PM   #17
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$899.99.... wow
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      05-08-2012, 06:35 PM   #18
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Without the coating...
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      05-09-2012, 09:53 AM   #19
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Quote:
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Without the coating...
Indeed not cheap. But I def. Recommend it!
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      05-09-2012, 04:34 PM   #20
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I'm really worried about the loudness of the DP...

Any performance gain?
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      05-09-2012, 04:49 PM   #21
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Quote:
Originally Posted by BMW_Belgier View Post
I'm really worried about the loudness of the DP...

Any performance gain?
It will be louder for sure, not as loud as catless DP's but it will be much louder than stock.

AR's website states up to 15whp with tuning.
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      05-09-2012, 05:35 PM   #22
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Now you guys get me worrying

My PE has the golf tee mod now. If i enable the valve again when i would install the DP, would this compensate the extra noise?
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