Catted X-pipe options

//steve\\ · 10-24-2019, 01:10 PM

I'm new to these cars but it seems like catted x-pipe options are very limited? Am I looking in the wrong places? I know catless makes the most power and also tends to drone the least but I'm not particularly interested in running catless. Been there, done that with other cars.

What's a good one that works with the stock rear section or most aftermarket catbacks?

Scharbag · 10-24-2019, 06:13 PM

There are a few options.

I just got an RKP (Challenge) x-pipe with HFCs. Pretty sweet. Active Autowerk also sells a version with cats. I am sure there are others with good HFCs. A proper high flow cat will not rob you of very much performance.

As for smell, I find that the HFCs in my new x-pipe do a better job than the factory secondaries and test pipes.

Cheers,

kevin @ eas · 10-24-2019, 06:22 PM

AFE also makes a high flow catted x-pipe, resonated and un resonated. The AFE keeps the primary cats in the stock location which is nice.

Richbot · 10-25-2019, 06:44 AM

I have had the AFE 300cell catted/resonated xpipe on my car for 18 months and close to 17000 miles and have not thrown a cat efficiency code so if that’s a concern it might be your best option. The 200cell cats in primary location can be a bit of a crapshoot on maintaining OBD readiness according to the threads here

//steve\\ · 10-25-2019, 07:31 AM

Quote:

Originally Posted by Richbot

I have had the AFE 300cell catted/resonated xpipe on my car for 18 months and close to 17000 miles and have not thrown a cat efficiency code so if that’s a concern it might be your best option. The 200cell cats in primary location can be a bit of a crapshoot on maintaining OBD readiness according to the threads here

I would probably ultimately get some kind of tune to work around that and if had to swap the stock x-pipe on once a year for emissions no big deal. What else is done to your car and still decent power to be had?

L4ces · 10-25-2019, 09:36 AM

Quote:

Originally Posted by //steve\\

Quote:

Originally Posted by Richbot

I have had the AFE 300cell catted/resonated xpipe on my car for 18 months and close to 17000 miles and have not thrown a cat efficiency code so if that’s a concern it might be your best option. The 200cell cats in primary location can be a bit of a crapshoot on maintaining OBD readiness according to the threads here

I would probably ultimately get some kind of tune to work around that and if had to swap the stock x-pipe on once a year for emissions no big deal. What else is done to your car and still decent power to be had?

This is a crapshoot but I'll throw it out there just in case ...
If you do happen to be pairing this with an MPE, please consider providing an audio clip. Cheers

Adrian g. · 10-25-2019, 10:45 AM

This is your best option considering you want HFCs and assuming you want a more civilized sound (resonators) and if you have a budget -> RKP (Challenge) x-pipe with HFCs.

You will need ECU software to remove the Check Engine light.

Alternatively, if your budget allows the Akrapovic Evolution system (full titanium) is a very nice system (also, has HFCs and resonators)

luckyse7en · 10-25-2019, 12:49 PM

Like others have said. RKP (Challenge) just started offering x-pipes again. Street version removes secondary cats and keeps factory cats intact (no check engine light). Sport version removes primary cats and has high flow cats in the secondary position. Race is no cats at all.

//steve\\ · 10-25-2019, 01:18 PM

Ideally I'd like to remove some of the restriction of the cats but not entirely. Sounds like the Sport RKP is exactly what I'll want. My experience on other cars is that even the smallest amount of catalytic converter helps keep the smell down completely and also the rear of the car a bit cleaner (mine is Alpine white).

10-24-2019, 01:10 PM	#1
//steve\\ Major $//steve\\'s Avatar$ 1074 Rep 1,025 Posts Drives: 2012 E92 M3 Join Date: May 2012 Location: Atlanta, GA iTrader: (2)	Catted X-pipe options I'm new to these cars but it seems like catted x-pipe options are very limited? Am I looking in the wrong places? I know catless makes the most power and also tends to drone the least but I'm not particularly interested in running catless. Been there, done that with other cars. What's a good one that works with the stock rear section or most aftermarket catbacks?
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10-24-2019, 06:13 PM	#2
Scharbag Colonel 2631 Rep 2,142 Posts Drives: 2011 E92 M3 Join Date: Oct 2017 Location: Victoria iTrader: (0) Garage List 2011 BMW E92 M3 [0.00]	There are a few options. I just got an RKP (Challenge) x-pipe with HFCs. Pretty sweet. Active Autowerk also sells a version with cats. I am sure there are others with good HFCs. A proper high flow cat will not rob you of very much performance. As for smell, I find that the HFCs in my new x-pipe do a better job than the factory secondaries and test pipes. Cheers, __________________ 2011 E92 M3 - 6MT, ZCP, ZF LSD, ESS G1, Some other goodies...
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10-24-2019, 06:22 PM	#3
kevin @ eas BimmerPost Supporting Vendor 2940 Rep 21,749 Posts Drives: 2015 BMW M4 Join Date: Nov 2011 Location: Anaheim iTrader: (22)	AFE also makes a high flow catted x-pipe, resonated and un resonated. The AFE keeps the primary cats in the stock location which is nice. __________________ Kevin S. \| european auto source (eas) email: kevin@europeanautosource.com · web: https://europeanautosource.com· tel 866.669.0705 · ca: 714.369.8524 x31 GET DAILY UPDATES ON OUR BLOG · FACEBOOK · YOUTUBE · FLICKR · INSTAGRAM
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10-25-2019, 06:44 AM	#4
Richbot Major General 2760 Rep 5,483 Posts Drives: Jerez Black E90 Join Date: Sep 2007 Location: STL iTrader: (5)	I have had the AFE 300cell catted/resonated xpipe on my car for 18 months and close to 17000 miles and have not thrown a cat efficiency code so if that’s a concern it might be your best option. The 200cell cats in primary location can be a bit of a crapshoot on maintaining OBD readiness according to the threads here
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10-25-2019, 10:45 AM	#7
Adrian g. Lieutenant 246 Rep 433 Posts Drives: German Join Date: Nov 2011 Location: Dallas, TX iTrader: (11)	This is your best option considering you want HFCs and assuming you want a more civilized sound (resonators) and if you have a budget -> RKP (Challenge) x-pipe with HFCs. You will need ECU software to remove the Check Engine light. Alternatively, if your budget allows the Akrapovic Evolution system (full titanium) is a very nice system (also, has HFCs and resonators)
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10-25-2019, 12:49 PM	#8
luckyse7en Second Lieutenant 97 Rep 274 Posts Drives: 2013 BMW E92 M3 ZCP Join Date: May 2013 Location: Oregon iTrader: (0)	Like others have said. RKP (Challenge) just started offering x-pipes again. Street version removes secondary cats and keeps factory cats intact (no check engine light). Sport version removes primary cats and has high flow cats in the secondary position. Race is no cats at all. __________________ 2013 Alpine White E92 M3 ZCP - IND Paint Matched Reflectors
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10-25-2019, 01:18 PM	#9
//steve\\ Major $//steve\\'s Avatar$ 1074 Rep 1,025 Posts Drives: 2012 E92 M3 Join Date: May 2012 Location: Atlanta, GA iTrader: (2)	Ideally I'd like to remove some of the restriction of the cats but not entirely. Sounds like the Sport RKP is exactly what I'll want. My experience on other cars is that even the smallest amount of catalytic converter helps keep the smell down completely and also the rear of the car a bit cleaner (mine is Alpine white).
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