Catted Downpipe options

Chadi335is · 11-30-2019, 11:09 AM

Looking for some options for catted DPs and ones that won't through CEL.

Jeef · 11-30-2019, 11:44 AM

Quote:

Originally Posted by Chadi335is

Looking for some options for catted DPs and ones that won't through CEL.

better off going catless since most of these high flow cats wont pass

type-dRew · 11-30-2019, 11:48 AM

If you want a quality high flow catalyst you're going to need to spend money.

Pretty sure CPE catted downpipes or AR are the only ones that will pass emissions and not come apart in 9 months

mweisdorfer · 11-30-2019, 02:30 PM

Quote:

Originally Posted by Chadi335is

Looking for some options for catted DPs and ones that won't through CEL.

Basically there's 2 options in terms of brands.

1) Cobb

2) Turner Motorsports

Both are around 750-$800.00

Catless won't blow codes if you have a tune like MHD.

Catless are a lot less expensive and will yield a lot more HP.

Catted are for those who live in "green" states like California etc.

roadkillrob · 11-30-2019, 03:47 PM

The AR Design ones will throw a CEL, they claimed they would not and they didn't for about a year and then when they did start to throw inefficiency codes they just blamed it on BMW software being to stringent (and they stopped claiming they would not throw a code). I doubt anything much else will not throw codes after a year or 2, you are better off just going catless and running a DPfix.

AR States this NO CEL on pre 29.2 cars. Post 29.2 cars may require a DP Fix. and no car is pre 29.2 on earth anymore unless it never had a software update since 2008 but they all did to fix HPFP issues.

Some people do find the catless ones a bit raspy though so the hi flow cats help with that.

Chadi335is · 11-30-2019, 03:56 PM

Thanks guys... I am trying to avoid rasp and droning. Any cat less that minimize both?

Also, I did see VRSF had a catted version. Wondering if theirs compares to COBB and CP-E

georgelb · 11-30-2019, 07:40 PM

Just for longevity/emissions info...I've had CP-E catted for about 6.5 years now. No issues and pass emissions every year without issue.

mweisdorfer · 11-30-2019, 08:13 PM

Quote:

Originally Posted by Chadi335is

Thanks guys... I am trying to avoid rasp and droning. Any cat less that minimize both?

Also, I did see VRSF had a catted version. Wondering if theirs compares to COBB and CP-E

Well, if emissions aren't an issue, just remove the secondary cats and put vibrant 1792 resonators in their place.

No drone or rasp will occur

mike@x-ph.com · 12-04-2019, 01:53 PM

There is not a downpipe that guarantees no CEL, but we had the most luck with AR Design.

That being said unless EPA approved, all downpipe are illegal (even if they do not throw a CEL)

toekneex04 · 12-04-2019, 02:38 PM

Quote:

Originally Posted by georgelb

Just for longevity/emissions info...I've had CP-E catted for about 6.5 years now. No issues and pass emissions every year without issue.

How's the sound on your CP-E catted downpipes? Did you pair it with stock exhaust?

Jeff@TopGearSolutions · 12-05-2019, 10:54 AM

The AR Design would likely be one of the better options but doesn't guarantee CEL Free operation.

924er · 12-06-2019, 08:26 AM

If ur getting downpipes, ur must likely will want to get a tune in order to full the potential power out of it so most tunes in general will hide the CEL.

georgelb · 12-06-2019, 06:57 PM

Quote:

Originally Posted by toekneex04

How's the sound on your CP-E catted downpipes? Did you pair it with stock exhaust?

Yep, paired with stock exhaust and really just sounds like a throatier stock exhaust with no drone or rasp.

11-30-2019, 11:09 AM	#1
Chadi335is Second Lieutenant 34 Rep 267 Posts Drives: 335is Type R Spec XXX Join Date: Sep 2013 Location: GTA iTrader: (0)	Catted Downpipe options Looking for some options for catted DPs and ones that won't through CEL.
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11-30-2019, 11:48 AM	#3
type-dRew Major 641 Rep 1,245 Posts Drives: 2009 335i xDrive Join Date: Feb 2019 Location: Newport MI iTrader: (0)	If you want a quality high flow catalyst you're going to need to spend money. Pretty sure CPE catted downpipes or AR are the only ones that will pass emissions and not come apart in 9 months __________________ 2009 335i xDrive AT / 177k+ miles PSP 750ic / Fuel-It! Stage 1 / BMS CP / Sutphin Tuning / RFP E50 11.61 @ 117.5 New setup; Covid 19Ts on RFP 93 + ARM inlets, dp, VTT cp and PSP outlets
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11-30-2019, 03:47 PM	#5
roadkillrob Major General 857 Rep 5,446 Posts Drives: 08 335i,22 X3M, 2012 C63 Black Join Date: Jul 2007 Location: Boston iTrader: (15)	The AR Design ones will throw a CEL, they claimed they would not and they didn't for about a year and then when they did start to throw inefficiency codes they just blamed it on BMW software being to stringent (and they stopped claiming they would not throw a code). I doubt anything much else will not throw codes after a year or 2, you are better off just going catless and running a DPfix. AR States this NO CEL on pre 29.2 cars. Post 29.2 cars may require a DP Fix. and no car is pre 29.2 on earth anymore unless it never had a software update since 2008 but they all did to fix HPFP issues. Some people do find the catless ones a bit raspy though so the hi flow cats help with that. __________________ 2022 X3M Brooklyn Grey 2008 E93 335i FBO 2012 Mercedes C63 Black Series Alanite Grey
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11-30-2019, 03:56 PM	#6
Chadi335is Second Lieutenant 34 Rep 267 Posts Drives: 335is Type R Spec XXX Join Date: Sep 2013 Location: GTA iTrader: (0)	Thanks guys... I am trying to avoid rasp and droning. Any cat less that minimize both? Also, I did see VRSF had a catted version. Wondering if theirs compares to COBB and CP-E
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11-30-2019, 07:40 PM	#7
georgelb nsomneeak 39 Rep 501 Posts Drives: E92 RB 335i Join Date: Apr 2010 Location: DFW, TX iTrader: (3) Garage List 2007 335i [8.00]	Just for longevity/emissions info...I've had CP-E catted for about 6.5 years now. No issues and pass emissions every year without issue. __________________ RB Turbos w/ N20 TMAP Sensor \| 93 Octane Protune by Cobb Plano \| xHP Stage 3 \| BMS DCI \| STETT CP \| Forge DVs \| RB PCV \| Helix FMIC \| CP-E Catted DPs \| Walbro 450 \| Bilstein B12 \| M3 Control Arms \| Defiv Lockdown Kit \| BBS CH \| Michelin A/S 3+ Hixson BMW of Monroe, LA - Shady Dealer \|
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12-04-2019, 01:53 PM	#9
mike@x-ph.com BimmerPost Supporting Vendor 24081 Rep 190,597 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	There is not a downpipe that guarantees no CEL, but we had the most luck with AR Design. That being said unless EPA approved, all downpipe are illegal (even if they do not throw a CEL) __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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12-05-2019, 10:54 AM	#11
Jeff@TopGearSolutions 3441 Rep 79,212 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	The AR Design would likely be one of the better options but doesn't guarantee CEL Free operation.
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12-06-2019, 08:26 AM	#12
924er Colonel 352 Rep 2,050 Posts Drives: e92 335i '10 Join Date: Feb 2014 Location: Socal iTrader: (0)	If ur getting downpipes, ur must likely will want to get a tune in order to full the potential power out of it so most tunes in general will hide the CEL. __________________ '10 e92 N54 DCI intakes, ER chargepipe, TIAL BOV, VRSF 5in FMIC, BMS Downpipes COBB e30
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