Downpipe catless vs catted help

goon · 02-06-2015, 07:31 AM

In the market for a DP for N20. I was just about to order the afe when I read on their website it will cause a CEL to come on. I imagine this is the case for any catless DP out there. So I guess I need to buy a catted one to avoid the CEL? I'm running the afe scorcher module as a tune. Where can I buy a catted DP if it does not trigger a CEL?

bahasad · 02-06-2015, 08:16 AM

In thread for interests. I think **********s or extreme powerhouse offers some catted downpipes.

A question I have is whether the catted downpipes will have a noticeable performance improvement over stock? And also whether the cat will risk any accelerated degradation over time?

f30luxline · 02-06-2015, 11:22 AM

There are catted DP's but why? I never understood the development of high flow cats. I don't see a performance improvement being significant enough to justify. I agree with the points stated by bahasad.

I've heard Co2 spacers work for not causing any codes. I assume the aFe doesn't delete codes? This is why I chose the combo of catless ER DP and JB4. No codes or emissions issues.

smithf80 · 02-06-2015, 11:32 AM

Quote:

Originally Posted by f30luxline

There are catted DP's but why? I never understood the development of high flow cats. I don't see a performance improvement being significant enough to justify. I agree with the points stated by bahasad.

I've heard Co2 spacers work for not causing any codes. I assume the aFe doesn't delete codes? This is why I chose the combo of catless ER DP and JB4. No codes or emissions issues.

Do the spacers really stop codes? I feel like if they did then everyone on the E9x platform would be using them, especially people with the n55 for which there is no Dp Fix available.

Mike_L · 02-06-2015, 11:58 AM

Quote:

Originally Posted by f30luxline

There are catted DP's but why? I never understood the development of high flow cats. I don't see a performance improvement being significant enough to justify. I agree with the points stated by bahasad.

I've heard Co2 spacers work for not causing any codes. I assume the aFe doesn't delete codes? This is why I chose the combo of catless ER DP and JB4. No codes or emissions issues.

Performance increases more than enough to justify. Plus you stay legal with no risk of losing your car if you hit an EPA checkpoint. Cats are there for a reason. Removing them is a halfassed way of modding.

S4NoMore · 02-06-2015, 12:05 PM

Quote:

Originally Posted by Mike_L

Quote:

Originally Posted by f30luxline

There are catted DP's but why? I never understood the development of high flow cats. I don't see a performance improvement being significant enough to justify. I agree with the points stated by bahasad.

I've heard Co2 spacers work for not causing any codes. I assume the aFe doesn't delete codes? This is why I chose the combo of catless ER DP and JB4. No codes or emissions issues.

Performance increases more than enough to justify. Plus you stay legal with no risk of losing your car if you hit an EPA checkpoint. Cats are there for a reason. Removing them is a halfassed way of modding.

+1

High flow cats won't match a catless counterpart, but the performance gain is still very good. I no longer will consider going catless because I got sick of worrying about where I'd get inspected.

To the OP, the first Google result I saw indicates that ER now has a catted DP option.

f30luxline · 02-06-2015, 12:47 PM

Where have I been, lol. I never heard of EPA checkpoints, where do these take place? (not being a smartass)

Sure cats are in place for a reason..EPA regulations only. Honestly I don't care that my car pollutes the air more than EPA standards.

I feel it is hard to tell the difference from a high flow catted v catless DP. My county emissions require an OBD test and visual check for a cat and my car passed. EPA agents are probably wiser but around here unless you drive an old hot rod with an exhaust that sounds like it's open headers there is no concern of being caught. My car is as quite as stock at idle and at cruising and doesn't give off a horrid smell as other's have claimed.

f30luxline · 02-06-2015, 12:51 PM

Quote:

Originally Posted by smithf32

Do the spacers really stop codes? I feel like if they did then everyone on the E9x platform would be using them, especially people with the n55 for which there is no Dp Fix available.

I never did in-depth research on it as it wasn't a concern for me but I did read a few comments where people claimed it worked, may have not been here but was related to BMW.

goon · 02-06-2015, 01:24 PM

Quote:

Originally Posted by S4NoMore

+1

High flow cats won't match a catless counterpart, but the performance gain is still very good. I no longer will consider going catless because I got sick of worrying about where I'd get inspected.

To the OP, the first Google result I saw indicates that ER now has a catted DP option.

Yes, it's hard to believe they are almost twice the cost, but I'd rather pay a little more then deal with a check engine light. Thanks

mike@x-ph.com · 02-06-2015, 01:26 PM

Quote:

Originally Posted by bahasad

In thread for interests. I think **********s or extreme powerhouse offers some catted downpipes.

A question I have is whether the catted downpipes will have a noticeable performance improvement over stock? And also whether the cat will risk any accelerated degradation over time?

We do offer Evolution Racewerks cattted and catless DP

Quote:

Originally Posted by goon

In the market for a DP for N20. I was just about to order the afe when I read on their website it will cause a CEL to come on. I imagine this is the case for any catless DP out there. So I guess I need to buy a catted one to avoid the CEL? I'm running the afe scorcher module as a tune. Where can I buy a catted DP if it does not trigger a CEL?

JB4 clears the CEL light

goon · 02-06-2015, 01:52 PM

[QUOTE=mike@x-ph.com;17356699]We do offer Evolution Racewerks cattted and catless DP

Thanks do you have any dyno information supporting the gains from the ER catted DP?

mike@x-ph.com · 02-06-2015, 01:54 PM

[QUOTE=goon;17356880]

Quote:

Originally Posted by mike@x-ph.com

We do offer Evolution Racewerks cattted and catless DP

Thanks do you have any dyno information supporting the gains from the ER catted DP?

Evolution Racewerks have not posted any official dyno numbers yet.
But as mentioned above the gains going to be noticeable, just not as noticeable as Catless DP

Mike_L · 02-06-2015, 02:00 PM

Quote:

Originally Posted by f30luxline

Where have I been, lol. I never heard of EPA checkpoints, where do these take place? (not being a smartass)

They're mobile, so they could be anywhere. A couple of years ago there were some articles on the web that they were all over the roads in California. I've seen them in PA, SC and FL. Shockingly, I've never seen one in NY. Probably because of the visual and OBD emissions inspections every year and very strict laws.

bluesman · 02-18-2015, 09:09 PM

Quote:

Originally Posted by Mike_L

Performance increases more than enough to justify. Plus you stay legal with no risk of losing your car if you hit an EPA checkpoint. Cats are there for a reason. Removing them is a halfassed way of modding.

Is it really legal with a catted dp? Does it pass smog test?

Mike_L · 02-18-2015, 10:08 PM

Quote:

Originally Posted by bluesman

Is it really legal with a catted dp? Does it pass smog test?

It'll pass a smog test. Legally you aren't supposed to replace the cat unless the original one is damaged or bad. So if you really insist on being 100% "legal", whack it with a hammer before you take it off and shatter the brick. Then you can legally replace it with another one.

bluesman · 02-19-2015, 04:28 PM

Quote:

Originally Posted by Mike_L

It'll pass a smog test. Legally you aren't supposed to replace the cat unless the original one is damaged or bad. So if you really insist on being 100% "legal", whack it with a hammer before you take it off and shatter the brick. Then you can legally replace it with another one.

LOL I appreciate your wisdom. I am thinking about one as ER now has a catted DP for N26.

goon · 02-19-2015, 07:39 PM

Just installed my ER catted DP last week. Love it but it did trigger a CEL. I was told by ER to either go with the jb4 tune or install an O2 sensor spacer. I'm going to do both.

Mike_L · 02-19-2015, 08:05 PM

Thats why I'm not going with an ER. To release a catted DP that throws a CEL is stupid and inexcusable. There are tons of cats out there, so do some R&D and use one that doesn't throw the code.

Tothepoint · 02-20-2015, 09:14 AM

Quote:

Originally Posted by Mike_L

Thats why I'm not going with an ER. To release a catted DP that throws a CEL is stupid and inexcusable. There are tons of cats out there, so do some R&D and use one that doesn't throw the code.

You would think as much as ER charges for that Catted DP it wouldn't cause a CEL. I went with Wagner's Catted DP. It threw a CEL weeks ago and hasn't been back yet since I cleared it. Hopefully it was a one time thing.

bluesman · 02-20-2015, 04:44 PM

Quote:

Originally Posted by goon

Just installed my ER catted DP last week. Love it but it did trigger a CEL. I was told by ER to either go with the jb4 tune or install an O2 sensor spacer. I'm going to do both.

Let us know if you find a working O2 sensor spacer.

T_flare · 02-20-2015, 05:29 PM

Quote:

Originally Posted by Mike_L

Thats why I'm not going with an ER. To release a catted DP that throws a CEL is stupid and inexcusable. There are tons of cats out there, so do some R&D and use one that doesn't throw the code.

almost 900 bucks for a CEL, i agree

r33_RGSport · 02-23-2015, 12:44 AM

Any High Flow catted down pipe is not guaranteed to not throw a CEL.
You can call any manufacturer that sell or make them.
The reason being is because the number of cells is different between OEM and the High Flow.
The reason they offer a High Flow is for some users that are still concern about the polution but still wanted the performance minus the DOT requirement where killing all the fun. There may be some other reasons also.
But yea, as a reseller, I have talked to most of the manufacturer, so far, no one willing to give me 100% guarantee no CEL.

02-06-2015, 07:31 AM	#1
goon Second Lieutenant 126 Rep 265 Posts Drives: 2014 328i AW Join Date: Dec 2010 Location: Orlando, FL iTrader: (0) Garage List 2014 BMW 328i [10.00]	Downpipe catless vs catted help In the market for a DP for N20. I was just about to order the afe when I read on their website it will cause a CEL to come on. I imagine this is the case for any catless DP out there. So I guess I need to buy a catted one to avoid the CEL? I'm running the afe scorcher module as a tune. Where can I buy a catted DP if it does not trigger a CEL? __________________ MODS: afe intake, afe scoop, afe scorcher module, 19" AG M580's, H&R Sports, AWE Tuning exhaust, LED conversion,wrapped interior, msport steering wheel, msport aero kit
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02-06-2015, 08:16 AM	#2
bahasad Major 328 Rep 1,490 Posts Drives: F30, E90 Join Date: Jul 2013 Location: Somewhereinamerica iTrader: (4)	In thread for interests. I think ********s or extreme powerhouse offers some catted downpipes. A question I have is whether the catted downpipes will have a noticeable performance improvement over stock? And also whether the cat will risk any accelerated degradation over time? __________________ Current: 17 Mustang GT no bmw Gone but not forgotten**: 07 E90 335I, 04 UA6, 95 E36, 04 EP3, 16 S550 EB, 14 F30 328I Stg 1, 08 E90 328I
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02-06-2015, 11:22 AM	#3
f30luxline e92 - 335i 179 Rep 743 Posts Drives: thisonetimeatbandcamp Join Date: Nov 2013 Location: Orlando iTrader: (1)	There are catted DP's but why? I never understood the development of high flow cats. I don't see a performance improvement being significant enough to justify. I agree with the points stated by bahasad. I've heard Co2 spacers work for not causing any codes. I assume the aFe doesn't delete codes? This is why I chose the combo of catless ER DP and JB4. No codes or emissions issues.
	Appreciate 0 Quote

02-06-2015, 12:47 PM	#7
f30luxline e92 - 335i 179 Rep 743 Posts Drives: thisonetimeatbandcamp Join Date: Nov 2013 Location: Orlando iTrader: (1)	Where have I been, lol. I never heard of EPA checkpoints, where do these take place? (not being a smartass) Sure cats are in place for a reason..EPA regulations only. Honestly I don't care that my car pollutes the air more than EPA standards. I feel it is hard to tell the difference from a high flow catted v catless DP. My county emissions require an OBD test and visual check for a cat and my car passed. EPA agents are probably wiser but around here unless you drive an old hot rod with an exhaust that sounds like it's open headers there is no concern of being caught. My car is as quite as stock at idle and at cruising and doesn't give off a horrid smell as other's have claimed.
	Appreciate 0 Quote

02-06-2015, 01:52 PM	#11
goon Second Lieutenant 126 Rep 265 Posts Drives: 2014 328i AW Join Date: Dec 2010 Location: Orlando, FL iTrader: (0) Garage List 2014 BMW 328i [10.00]	[QUOTE=mike@x-ph.com;17356699]We do offer Evolution Racewerks cattted and catless DP Thanks do you have any dyno information supporting the gains from the ER catted DP? __________________ MODS: afe intake, afe scoop, afe scorcher module, 19" AG M580's, H&R Sports, AWE Tuning exhaust, LED conversion,wrapped interior, msport steering wheel, msport aero kit
	Appreciate 0 Quote

02-19-2015, 07:39 PM	#17
goon Second Lieutenant 126 Rep 265 Posts Drives: 2014 328i AW Join Date: Dec 2010 Location: Orlando, FL iTrader: (0) Garage List 2014 BMW 328i [10.00]	Just installed my ER catted DP last week. Love it but it did trigger a CEL. I was told by ER to either go with the jb4 tune or install an O2 sensor spacer. I'm going to do both.
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02-19-2015, 08:05 PM	#18
Mike_L Banned 284 Rep 1,961 Posts Drives: 2015 335xi GT M-Sport MPPK Join Date: Jun 2013 Location: New York City iTrader: (2)	Thats why I'm not going with an ER. To release a catted DP that throws a CEL is stupid and inexcusable. There are tons of cats out there, so do some R&D and use one that doesn't throw the code.
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02-23-2015, 12:44 AM	#22
r33_RGSport BimmerPost Supporting Vendor 13109 Rep 18,786 Posts Drives: G09 XM, G05 X5 40, 991.2 T Join Date: Oct 2009 Location: So. Cal iTrader: (6)	Any High Flow catted down pipe is not guaranteed to not throw a CEL. You can call any manufacturer that sell or make them. The reason being is because the number of cells is different between OEM and the High Flow. The reason they offer a High Flow is for some users that are still concern about the polution but still wanted the performance minus the DOT requirement where killing all the fun. There may be some other reasons also. But yea, as a reseller, I have talked to most of the manufacturer, so far, no one willing to give me 100% guarantee no CEL. __________________ Email:sales@rgsport.com \| IG:RGSport_USA \| Web:RGSportShop.com PM for Everyday DEALS!! MSS • iSweep • RaceChip • Sterckenn • AutoTecknic • Akrapovic • Vossen Wheels • Eventuri Active Autowerke • KW • H&R • Ohlins • Remus • and more...
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