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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > B58 Turbo Engine / Drivetrain / Exhaust Modifications > Stone Exhaust B58 Eddy Downpipe ** NO CEL GUARANTEE **
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      05-03-2019, 12:10 AM   #1
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Talking Stone Exhaust B58 Eddy Downpipe ** NO CEL GUARANTEE **



Eddy Catalytic Downpipe (B58)

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.


Also available catless

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      05-03-2019, 01:04 PM   #2
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Mike does the catless version also guarantee no CEL? Reading the description it sounds cool, but in the end, what does it really do differently than a traditional catted/catless downpipe?
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      05-03-2019, 01:24 PM   #3
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These catted DP's need to come down in cost drastically... not worth it at all besides VRSF and AFE
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      05-03-2019, 02:20 PM   #4
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Quote:
Originally Posted by BPAC306 View Post
These catted DP's need to come down in cost drastically... not worth it at all besides VRSF and AFE
Did you try the AFE? The $ is nice and low
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      05-03-2019, 02:21 PM   #5
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@Mike they claim increased hp .... any reliable dyno to back-up this claim
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      05-03-2019, 03:05 PM   #6
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Nice! 200 cell high flow cat? Looks like a funnel
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      05-03-2019, 03:39 PM   #7
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Quote:
Originally Posted by Solid67 View Post
Mike does the catless version also guarantee no CEL? Reading the description it sounds cool, but in the end, what does it really do differently than a traditional catted/catless downpipe?
Its only guaranteed with catted downpipe

Quote:
Originally Posted by BPAC306 View Post
These catted DP's need to come down in cost drastically... not worth it at all besides VRSF and AFE
VRSF and AFE catted do not guarantee no CEL, its a different product for a different audience

Quote:
Originally Posted by marcthedark View Post
Did you try the AFE? The $ is nice and low
But it throws a CEL

Quote:
Originally Posted by marcthedark View Post
@Mike they claim increased hp .... any reliable dyno to back-up this claim

I do not have any independent dyno unfortunately
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