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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > Stone Exhaust N55 Eddy Downpipe ** NO CEL GUARANTEE **
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      05-02-2019, 11:55 PM   #1
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Talking Stone Exhaust N55 Eddy Downpipe ** NO CEL GUARANTEE **



Fitment:
  • M2
  • M235
  • 435
  • 335 (production date of 07/13 and after)
  • M135 (production date of 07/13 and after)

POWER
+ 24.4Ps
at 5734rpm

TORQUE
+ 2.3Kg/m
at 2921rpm

Eddy Catalytic Downpipe (N55)
Meet the latest technology that adheres to the world's increasingly stringent environmental regulations at the same time enhances performance to another level. In comparison to commercially available linear frustums, the "eddy catalytic technology" adopts an arc-packaging method.

The turbine emissions process produces a vortex effect which purifies the exhaust gases while maintaining an equal amount of back pressure. When compared to a variety of horsepower tests and straight downpipes, our patented eddy catalytic technology can effectively increase horsepower and torque.


Features:
1. Patented O2 sensor technology design provides real-time data performance by accurately sensing every rotating displacement. No more delayed or error code problem.
2.Using one of the rare noble metal to help efficiently filter out exhaust gas.
3.Computer simulation of the best diameter.
4.A special 3D design able to achieve a perfectly matching model with the original pipe. The same installation applies, no need to modify.
5.SUS304 Stainless steel.
6.Dual Cross-Welding Technology providing substantial increase durability.


Dyno


Also available catless

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      05-03-2019, 12:57 AM   #2
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A lot of sales talk...but how many cells is it?
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      05-03-2019, 11:38 AM   #3
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Quote:
Originally Posted by harkes View Post
A lot of sales talk...but how many cells is it?
200 CEL

Quote:
Originally Posted by nawfoo View Post
this should be moved to classifieds.
Its a new product release thread, purposely does not have a link to the website or pricing info. Per forum rules this is the correct section for it
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      05-03-2019, 06:21 PM   #4
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A single 200 cell is definitely going to throw a code
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      05-03-2019, 09:42 PM   #5
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Quote:
Originally Posted by Eddien123 View Post
A single 200 cell is definitely going to throw a code
Fabspeed does not
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      05-06-2019, 03:24 AM   #6
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Correct - the HJS 200 used by FabSpeed does not throw CEL

Mike-

Quote:
In comparison to commercially available linear frustums, the "eddy catalytic technology" adopts an arc-packaging method.
This sounds as if the actual cat core is not of the usual construction?

Do you have any pics of the core itself?

Since they do not state that core is specifically HJS, wondering how their special construction = no CEL?

Be nice to see some scientific details/descriptions as to how no CEL is obtained vs. the buzz word/hype sales pitch


It is a beautifully welded part
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      05-06-2019, 07:10 AM   #7
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yet another $1300 downpipe. looks like it doesnt fit PWG cars.
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      05-06-2019, 08:17 AM   #8
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Quote:
Originally Posted by 1QuikWS6 View Post
Correct - the HJS 200 used by FabSpeed does not throw CEL

Mike-



This sounds as if the actual cat core is not of the usual construction?

Do you have any pics of the core itself?

Since they do not state that core is specifically HJS, wondering how their special construction = no CEL?

Be nice to see some scientific details/descriptions as to how no CEL is obtained vs. the buzz word/hype sales pitch


It is a beautifully welded part
Its not HJS cat, they use their own cats. They do not share much info, i had a meeting with one of the reps couple months ago in Las Vegas and they worry about competition copying their design if they share too much.


Quote:
Originally Posted by wdeerfield View Post
yet another $1300 downpipe. looks like it doesnt fit PWG cars.
It does not

You got Fabspeed which wont throw a CEL
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      05-11-2019, 11:58 AM   #9
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Quote:
Originally Posted by mike@x-ph.com View Post
Fabspeed does not
Do you know if this cat will show in a "ready state" during emissions check? I believe Fab speeds does.
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      05-13-2019, 09:16 AM   #10
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Quote:
Originally Posted by nawfoo View Post
just has a car salesman vibe
Yea...this gives off a weird vibe. Maybe it's their English, but this absolutely reminded me of a turboencabulator.

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      10-11-2019, 10:22 AM   #11
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Confirming they guarantee no cel?
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      10-11-2019, 01:51 PM   #12
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Quote:
Originally Posted by 435gc View Post
Confirming they guarantee no cel?
Correct
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      10-11-2019, 02:37 PM   #13
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What's the guaranteed if cel does come up. Money back, replacement?
Wagner was suppose to not throw a code but it eventually did.
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      10-11-2019, 02:49 PM   #14
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Quote:
Originally Posted by jv004 View Post
What's the guaranteed if cel does come up. Money back, replacement?
Wagner was suppose to not throw a code but it eventually did.
i dont believe Wagner ever guaranteed it wouldnt throw a code. Fabspeed and now this one explicitly guarantee it. what that "guarantee" is worth though..
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      10-11-2019, 02:51 PM   #15
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Quote:
Originally Posted by jv004 View Post
What's the guaranteed if cel does come up. Money back, replacement?
Wagner was suppose to not throw a code but it eventually did.
Quote:
Originally Posted by DrBall View Post
i dont believe Wagner ever guaranteed it wouldnt throw a code. Fabspeed and now this one explicitly guarantee it. what that "guarantee" is worth though..
forget what companies guarantee and check for forums for reviews.

Thousand of Fabspeed customers, success rate is pretty close to 100%

If it was my car, i would pick fabspeed
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      10-12-2019, 10:49 AM   #16
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Has anyone bought this catted d-pipe yet? Any reviews out there?

I am intrigued to know what power gains have been, see what the sound is like, how install/fitment was?

I am interested in getting a catted d-pipe that will not throw a cel, and have been holding off due to the cost of the Fabspeed. This is a few hundred cheaper. That would allow me to purchase additional upgrades and not go all in on a single part.
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      10-14-2019, 12:03 PM   #17
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Quote:
Originally Posted by 435gc View Post
Has anyone bought this catted d-pipe yet? Any reviews out there?

I am intrigued to know what power gains have been, see what the sound is like, how install/fitment was?

I am interested in getting a catted d-pipe that will not throw a cel, and have been holding off due to the cost of the Fabspeed. This is a few hundred cheaper. That would allow me to purchase additional upgrades and not go all in on a single part.
I believe we are the only ones on these forums that offer this option. Lots of users are interested but they end up going with Fabspeed.

To be honest with you, i would too since its a more proven option
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