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2Addicts | BMW 2-Series forum Technical Topics N20 (228i) / B46 (230i) Engine, Transmission, Exhaust, Tuning Catless vs High perf catted DP:

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      03-07-2020, 02:38 PM   #1
Maynard
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Catless vs High perf catted DP:

Curious if anybody has direct comparison info about how much difference there is between these (aside from price, of course, and issues w/ CEL). This would be for a low-mid stage build, not planning to try to go for absolute max power (jb4 and intercooler). I'm one of those tree huggers so I lean towards wanting to keep the emissions down unless there is a huge difference.

Edit - wasn't clear enough with my first attempt (or TMI). My Q is: anybody have fairly direct info about the power difference between a high perf catted DP and a catless DP, in a mid-stage build (upgraded intercooler, tune box, and exhaust, but not bigger turbo or engine/fueling mods).

Last edited by Maynard; 03-08-2020 at 11:46 AM..
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      03-07-2020, 03:00 PM   #2
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If you're worried about emissions, isn't the decision already clear? Catless DPs won't pass emissions for NY. That said, I know there should be anywhere between a 5-10 hp/tq difference, with the catless having more due to better airflow.
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      03-07-2020, 05:11 PM   #3
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yep Autowerkes or Fabspeed catted.
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      03-08-2020, 11:48 AM   #4
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I think I wasn't clear enough with my first attempt (or TMI). My Q is: anybody have fairly direct info about the power difference between a high perf catted DP and a catless DP, in a mid-stage build (upgraded intercooler, tune box, and exhaust, but not bigger turbo or engine/fueling mods).
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      03-08-2020, 01:03 PM   #5
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Quote:
Originally Posted by Maynard View Post
I think I wasn't clear enough with my first attempt (or TMI). My Q is: anybody have fairly direct info about the power difference between a high perf catted DP and a catless DP, in a mid-stage build (upgraded intercooler, tune box, and exhaust, but not bigger turbo or engine/fueling mods).
Power gains are the same on stock turbo application.
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      03-08-2020, 02:27 PM   #6
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Quote:
Originally Posted by mike@x-ph.com View Post
Power gains are the same on stock turbo application.
Will the ER catted DP throw CEL codes?
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      03-08-2020, 03:04 PM   #7
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Quote:
Originally Posted by Maynard View Post
Will the ER catted DP throw CEL codes?
It might, no "no CEL guarantee".
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      03-29-2020, 03:25 PM   #8
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Wagner VS VRSF Catted

I am on the Fence between the two???
.
.
Are the internal cats the same quality on both?
.
I love the price of the VRSF Catted = $400 including hardware
.
Wagner Catted is highly rated and even the AA Catted is NO CEL .


I am so close to BM3 and VRSF Catted --- YOUR THOUGHTS??
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      03-30-2020, 08:21 PM   #9
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Quote:
Originally Posted by 123Britt View Post
I am on the Fence between the two???
.
.
Are the internal cats the same quality on both?
.
I love the price of the VRSF Catted = $400 including hardware
.
Wagner Catted is highly rated and even the AA Catted is NO CEL .


I am so close to BM3 and VRSF Catted --- YOUR THOUGHTS??
Not many companies release much info on the brand of cats used in their downpipes. I know Active Autwerke use GESI cats, Fabspeed uses HJS and wagner use Euro6 cats (they do not specify the brand).

I dont know much about the brand of cats other brands use
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