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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 > NEW VRSF ANNOUNCEMENT! Revised Catless and Catted Downpipes!



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      07-31-2016, 03:24 PM   #45
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Quote:
Originally Posted by EB89
Quote:
Originally Posted by Tiago@VRSF View Post
AR isn't a cast option and they're out of business.
Ok fair enough, whats cast mean and why is it better?
Cast means they dump molten metal into a mold and thats how its made.
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      07-31-2016, 03:28 PM   #46
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Quote:
Originally Posted by dleccord
Is CA still doing sniff tests? If not, why should we get the catted version?
They dont. As long as you dont have a cel your good.
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      08-01-2016, 07:49 AM   #47
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Tiago, I noticed that your website shows an option for a CEL delete for the N55 catless dp. Is this a mistake? Your DP fix shows that it is only compatible with the N54.
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      08-01-2016, 10:12 AM   #48
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Quote:
Originally Posted by Tiago@VRSF View Post
It's not a mistake, we now offer one for the N55 as well.
details??
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      08-01-2016, 10:19 AM   #49
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Quote:
Originally Posted by dleccord View Post
Is CA still doing sniff tests? If not, why should we get the catted version?
Catted version would theoretically not require a DP FIX or auto clear function on a tune. Theoretically you'd then be able to pass emissions via OBD II. It's also greener for the environment.
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      08-01-2016, 10:34 PM   #50
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Quote:
Originally Posted by Tiago@VRSF View Post
It's a downpipe fix. You install it, the CEL goes away
I know the fixes usually involve resistors/capacitors of some sort, does this in anyway affect the readout for the AFR by relaying a false signal? Seems a non-catted downpipe with the N55 fix would be a good way to go versus risking the light on a catted.

Also details of install? Plug-and-play or is there splicing of wires involved?

Last edited by MDesign Performance; 08-01-2016 at 10:52 PM..
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      08-02-2016, 06:45 PM   #51
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I'm also curious about the DP fix. Any DIY install or write up?
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      08-03-2016, 08:34 AM   #52
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2011 335Xi  [0.00]
So is this the A74 fix or something similar?
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      08-03-2016, 11:36 AM   #53
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Quote:
Originally Posted by Tiago@VRSF View Post
No writeup yet unfortunately. This installs in the o2 sensor wiring at the engine bay.
Can you comment on the reliability of leaving it connected all the time? I was reading something the other day that suggested removing a DP fix after passing emissions.
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      08-10-2016, 05:03 PM   #54
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Quote:
Originally Posted by Tiago@VRSF View Post
The N54 requires the removal after temporary use. The N55 does not use the rear o2 for fuel trims like the N54 so you shouldn't have any issues with prolonged installation.
Good to know
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      08-12-2016, 10:42 AM   #55
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I have the catless DP and DP fix on the way from VRSF along with some other parts. I can update on if the DP fix once it's on the car. Any details on specific wires that need to be spliced? You can email me as well if you don't want to post that here.
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      08-12-2016, 12:37 PM   #56
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Quote:
Originally Posted by AtlasM View Post
I have the catless DP and DP fix on the way from VRSF along with some other parts. I can update on if the DP fix once it's on the car. Any details on specific wires that need to be spliced? You can email me as well if you don't want to post that here.
Not sure if this question was for me or tiago but if you got the product from us pm me your order number
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      08-16-2016, 09:09 PM   #57
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Are there any combination packages/discounts for VRSF product line?

Downpipe
FMIC+Lower DP
Chargepipe

For the N55 2011 335ixdrive
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      08-17-2016, 01:40 PM   #58
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Quote:
Originally Posted by Diox View Post
Are there any combination packages/discounts for VRSF product line?

Downpipe
FMIC+Lower DP
Chargepipe

For the N55 2011 335ixdrive
Yes there is
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      09-25-2018, 08:28 AM   #59
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I'm looking for catted downpipes to replace my cat less AR downpipes. The smell is nauseating. Please contact me if you have catted dps 9546732755
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      09-25-2018, 09:45 AM   #60
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Quote:
Originally Posted by 550imsport2014 View Post
I'm looking for catted downpipes to replace my cat less AR downpipes. The smell is nauseating. Please contact me if you have catted dps 9546732755
If it smells that bad, you might have an exhaust leak. I am catless with stock exhaust and you can't smell anything from my car.
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      09-25-2018, 11:16 AM   #61
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Also just go to their website and order it. You expect them to call you from a forum post?
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      09-25-2018, 04:31 PM   #62
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Quote:
Originally Posted by NRigs View Post
If it smells that bad, you might have an exhaust leak. I am catless with stock exhaust and you can't smell anything from my car.
You have secondary cats, he does not.
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      09-25-2018, 06:55 PM   #63
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Quote:
Originally Posted by Turbod View Post
You have secondary cats, he does not.
Ahhh yes. That would certainly make a difference!
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