Good Emissions Friendly exhaust options

WyoGuyM3 · 03-08-2021, 09:40 AM

Ladies and Gents, my wife and I are moving to Northern Colorado, and recently purchased a F80 M3, completely stock. I don't have big plans for mods, except exhaust and a couple other things. I was leaning towards the Dinan axle back exhaust, because he will still pass the emissions tests. Are there other options, opinions and or advice? Needs to be emissions friendly. I will have to get tested every 2 years. Thank you all.

RE36TRO · 03-08-2021, 09:47 AM

Are you referring to passing a visual as well? As long as you don't alter the DP anything cat back still passes the sniffer here in CA which sounds like similar emissions requirements.

WyoGuyM3 · 03-08-2021, 10:25 AM

Quote:

Originally Posted by RE36TRO

Are you referring to passing a visual as well? As long as you don't alter the DP anything cat back still passes the sniffer here in CA which sounds like similar emissions requirements.

Thank you!

blkcow · 03-08-2021, 01:03 PM

Quote:

Originally Posted by RE36TRO

Are you referring to passing a visual as well? As long as you don't alter the DP anything cat back still passes the sniffer here in CA which sounds like similar emissions requirements.

I'm debating getting a midpipe myself because of emissions mainly because the visual. Anything past the main cats should be technically ok but since the F8x has secondary cats that's modifying/removing existing emissions equipment. Is it possible to pass with a midpipe in CA?

RE36TRO · 03-08-2021, 01:18 PM

Quote:

Originally Posted by blkcow11291

Quote:

Originally Posted by RE36TRO

Are you referring to passing a visual as well? As long as you don't alter the DP anything cat back still passes the sniffer here in CA which sounds like similar emissions requirements.

I'm debating getting a midpipe myself because of emissions mainly because the visual. Anything past the main cats should be technically ok but since the F8x has secondary cats that's modifying/removing existing emissions equipment. Is it possible to pass with a midpipe in CA?

I just passed with my AA mid pipe however visual is subjective depending on where you take it. For the most part, it's not noticeable.

N1rve · 03-08-2021, 01:46 PM

Quote:

Originally Posted by WyoGuyM3

Ladies and Gents, my wife and I are moving to Northern Colorado, and recently purchased a F80 M3, completely stock. I don't have big plans for mods, except exhaust and a couple other things. I was leaning towards the Dinan axle back exhaust, because he will still pass the emissions tests. Are there other options, opinions and or advice? Needs to be emissions friendly. I will have to get tested every 2 years. Thank you all.

Anything that is a catback is fine because it’s after the catalytic converters. Not sure if Colorado has a sound restriction but CA has a 98db limit.

HyeM3 · 03-08-2021, 01:47 PM

Quote:

Originally Posted by blkcow11291

I'm debating getting a midpipe myself because of emissions mainly because the visual. Anything past the main cats should be technically ok but since the F8x has secondary cats that's modifying/removing existing emissions equipment. Is it possible to pass with a midpipe in CA?

My last car I had a catback that deleted the secondary cats and was loud as hell and passed a smog check at a regular station and a star station. It's definitely possible, many places just look under the hood and don't lift the car up to check for secondary cats

WyoGuyM3 · 03-12-2021, 10:48 AM

Quote:

Originally Posted by N1rve

Anything that is a catback is fine because it’s after the catalytic converters. Not sure if Colorado has a sound restriction but CA has a 98db limit.

Thank you very much

Bigsurprise · 03-13-2021, 09:56 AM

I sold my Remus cat back just for this reason. I'm running stock exhaust with MPE now because there is always the chance of failing if you remove the last set of cats like most(nearly all) midpipes do.

Yes there are places that will pass you but this is my daily driver and I'm not looking to push my luck.

WyoGuyM3 · 03-27-2021, 03:38 PM

Quote:

Originally Posted by Bigsurprise

I sold my Remus cat back just for this reason. I'm running stock exhaust with MPE now because there is always the chance of failing if you remove the last set of cats like most(nearly all) midpipes do.

Yes there are places that will pass you but this is my daily driver and I'm not looking to push my luck.

Thank you! I think I'm just gonna do a Dinan cat back and call it good

icegrill · 03-27-2021, 05:10 PM

Quote:

Originally Posted by WyoGuyM3

Quote:

Originally Posted by Bigsurprise

I sold my Remus cat back just for this reason. I'm running stock exhaust with MPE now because there is always the chance of failing if you remove the last set of cats like most(nearly all) midpipes do.

Yes there are places that will pass you but this is my daily driver and I'm not looking to push my luck.

Thank you! I think I'm just gonna do a Dinan cat back and call it good

Too bad the damn things are on 3 month back order🤬

E92TiAg335i · 03-27-2021, 05:55 PM

Catless downpipes and a straight pipe.

N1rve · 03-30-2021, 01:14 PM

Quote:

Originally Posted by E92TiAg335i

Catless downpipes and a straight pipe.

I don't think running Catless helps with OP's Emission Friendly exhaust goal.

horsepower_and_hounds · 03-31-2021, 08:21 AM

Quote:

Originally Posted by E92TiAg335i

Catless downpipes and a straight pipe.

some people cant read

E92TiAg335i · 03-31-2021, 01:05 PM

Quote:

Originally Posted by horsepower_and_hounds

Quote:

Originally Posted by E92TiAg335i

Catless downpipes and a straight pipe.

some people cant read

I'm actually shocked how many of you didn't pick up on my trolling...

03-08-2021, 09:40 AM	#1
WyoGuyM3 New Member 10 Rep 16 Posts Drives: 2016 F80 M3 Join Date: Mar 2021 Location: Colorado iTrader: (0) Garage List 2016 BMW M3 [0.00]	Good Emissions Friendly exhaust options Ladies and Gents, my wife and I are moving to Northern Colorado, and recently purchased a F80 M3, completely stock. I don't have big plans for mods, except exhaust and a couple other things. I was leaning towards the Dinan axle back exhaust, because he will still pass the emissions tests. Are there other options, opinions and or advice? Needs to be emissions friendly. I will have to get tested every 2 years. Thank you all. __________________ WyoGuyM3 2016 M3 Dinan Axle Back Exhaust, work in progress
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03-08-2021, 09:47 AM	#2
RE36TRO Lieutenant 212 Rep 431 Posts Drives: ///E36,E46,E92,F80 Join Date: Nov 2019 Location: Santa Clara, CA iTrader: (5)	Are you referring to passing a visual as well? As long as you don't alter the DP anything cat back still passes the sniffer here in CA which sounds like similar emissions requirements.
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03-13-2021, 09:56 AM	#9
Bigsurprise Private First Class 100 Rep 113 Posts Drives: '17 M3 ZCP Join Date: Jan 2016 Location: Bay Area, Ca iTrader: (0)	I sold my Remus cat back just for this reason. I'm running stock exhaust with MPE now because there is always the chance of failing if you remove the last set of cats like most(nearly all) midpipes do. Yes there are places that will pass you but this is my daily driver and I'm not looking to push my luck. __________________ '18 Audi Q7 Prestige - APR Stage 2 single pulley '19 Accord Hybrid '17 M3 ZCP - DCT - BM3 Stage 1 gone '18 M3 - 6mt - BPM Stage 1 gone '15 335i gone
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03-27-2021, 05:55 PM	#12
E92TiAg335i Captain 218 Rep 849 Posts Drives: 2016 F82 M4 Azurite/Opal DCT Join Date: Sep 2015 Location: Boca Raton, Florida iTrader: (0)	Catless downpipes and a straight pipe. __________________ Current: 2016 F82 DCT M4 FBO Daily.
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