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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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      07-13-2012, 01:25 PM   #45
Swadeness
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Did you get a warning without the tune?
I have had the AR catted DP on for about three hundred miles or so and have had zero issues. I am still on the stock tune so I can verify there is no check engine light with the catted version (at least in my case). After the first 100 miles or so there is no odor to speak of. Emree's comments on the sound are spot on. I really like how it sounds and I'm considering just leaving the rest of the exhaust stock.
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      07-13-2012, 02:29 PM   #46
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I have had the AR catted DP on for about three hundred miles or so and have had zero issues. I am still on the stock tune so I can verify there is no check engine light with the catted version (at least in my case). After the first 100 miles or so there is no odor to speak of. Emree's comments on the sound are spot on. I really like how it sounds and I'm considering just leaving the rest of the exhaust stock.
THX That helps me a lot!

Do you have the possebility to do a video? The sound it makes does interesst me!
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      07-16-2012, 01:09 PM   #47
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is there an increase in HP without running any maps?
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      07-16-2012, 01:31 PM   #48
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is there an increase in HP without running any maps?
+1

Good question
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      07-16-2012, 01:59 PM   #49
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is there an increase in HP without running any maps?
To be honest I didn't notice much of an increase, but I didn't really expect to. The turbo does seem to spool just a bit quicker and it seems to pull better up top. But it is a small difference. I was really just opening up the exhaust so its ready when I decide to get a tune.

Also I got my first SES light over the weekend. It stayed for about a day and a half and then just disappeared on its own. I don't have a scan tool so I don't know why the light came on. But I have a strong suspicion the light was due to bad fuel rather than the DP.
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      07-16-2012, 03:12 PM   #50
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To be honest I didn't notice much of an increase, but I didn't really expect to. The turbo does seem to spool just a bit quicker and it seems to pull better up top. But it is a small difference. I was really just opening up the exhaust so its ready when I decide to get a tune.
That's a bit disapointing

I hoped that you could feel it being opened up... I'm not interested in a tune right now (warrenty), so it was my way to more HP...

Somebody has to convince me now to why i should buy...
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