North America Spec Exhaust

Cavpilot2k · 10-10-2018, 02:55 PM

I've only seen EU-spec exhausts, so I'm not sure what is on the NA-spec version (obviously not the particulate flter).

Does the stock exhaust have primary (Downpipe) and secondary (midpipe) cats in addition to a resonator?

M-Pilot · 10-10-2018, 02:58 PM

In the US spec exhaust system, OPFs are replaced with secondary cats, that's it. Both versions have primary cats and a resonator.

Cavpilot2k · 10-10-2018, 03:01 PM

Quote:

Originally Posted by cntzl

In the US spec exhaust system, OPFs are replaced with secondary cats, that's it. Both versions have primary cats and a resonator.

Okay thanks. THOSE will be the first thing to come out...

hellrotm · 10-10-2018, 04:45 PM

Quote:

Originally Posted by cntzl

In the US spec exhaust system, OPFs are replaced with secondary cats, that's it. Both versions have primary cats and a resonator.

Exactly, other than that identical exhaust setups.

Poochie · 10-10-2018, 09:50 PM

Quote:

Originally Posted by cntzl

In the US spec exhaust system, OPFs are replaced with secondary cats, that's it. Both versions have primary cats and a resonator.

Hey, does the M2C MPE, to be named later, eliminate these secondary cats you're referring to?

https://www.m3post.com/forums/showthread.php?t=653585

M-Pilot · 10-10-2018, 10:07 PM

Quote:

Originally Posted by Poochie

Quote:

Originally Posted by cntzl

In the US spec exhaust system, OPFs are replaced with secondary cats, that's it. Both versions have primary cats and a resonator.

Hey, does the M2C MPE, to be named later, eliminate these secondary cats you're referring to?

https://www.m3post.com/forums/showthread.php?t=653585

MPE on M3/M4 comes with resonator delete while keeping the secondary cats. I expect it to be the same for the M2C MPE. However, there are aftermarket midpipes (e.g. AA, Fabspeed) that eliminate both secondary cats and the resonator.

Edit: I'm wrong, sorry. It's been a long day lol. M2C MPE is muffler only based on pics and BMW's M Performance catalog that was released couple months ago. So MPE for M2C won't delete the resonator or the secondary cats.

M-Pilot · 10-10-2018, 10:17 PM

Quote:

Originally Posted by Poochie

Quote:

Originally Posted by cntzl

In the US spec exhaust system, OPFs are replaced with secondary cats, that's it. Both versions have primary cats and a resonator.

Hey, does the M2C MPE, to be named later, eliminate these secondary cats you're referring to?

https://www.m3post.com/forums/showthread.php?t=653585

I'm wrong, sorry. It's been a long day lol. M2C MPE is muffler only based on pics and BMW's M Performance catalog that was released couple months ago. So MPE for M2C won't delete the resonator or the secondary cats.

Cavpilot2k · 10-11-2018, 10:02 AM

Sounds more and more like AA is going to be the go-to option, assuming they do a single midpipe like on their M4 signature exhaust.
Even Dinan does an X-pipe mid.
Combining the exhaust streams is key to getting optimal sound from S55.

ONLYA6 · 10-11-2018, 10:47 AM

AA will be releasing their single mid-pipe soon. I spoke with them last week.

10-10-2018, 02:55 PM	#1
Cavpilot2k Chief Warrant Officer 1025 Rep 1,638 Posts Drives: like a damn lunatic Join Date: Feb 2012 Location: Boston iTrader: (0)	North America Spec Exhaust I've only seen EU-spec exhausts, so I'm not sure what is on the NA-spec version (obviously not the particulate flter). Does the stock exhaust have primary (Downpipe) and secondary (midpipe) cats in addition to a resonator? __________________ "Prius" is Latin for Eunuch. "Hrothgar": 2012 135i: 6MT M-Sport, BSM/Blk; Nav, Premium, Convenience, HK Dinan Stage 2 +PPK /// BMW PE /// VRSF CP /// K&N /// Koni Sports /// RSFB Inserts /// MPS4S 225/255 /// Other Stuff
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10-10-2018, 02:58 PM	#2
M-Pilot Brigadier General 4859 Rep 3,659 Posts Drives: 981 Cayman GTS Join Date: Mar 2015 Location: CA iTrader: (0) Garage List 2024 BMW X5 [0.00] 2023 Toyota GR86 [0.00] 2016 Porsche Cayman ... [10.00]	In the US spec exhaust system, OPFs are replaced with secondary cats, that's it. Both versions have primary cats and a resonator.
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10-11-2018, 10:02 AM	#8
Cavpilot2k Chief Warrant Officer 1025 Rep 1,638 Posts Drives: like a damn lunatic Join Date: Feb 2012 Location: Boston iTrader: (0)	Sounds more and more like AA is going to be the go-to option, assuming they do a single midpipe like on their M4 signature exhaust. Even Dinan does an X-pipe mid. Combining the exhaust streams is key to getting optimal sound from S55. __________________ "Prius" is Latin for Eunuch. "Hrothgar": 2012 135i: 6MT M-Sport, BSM/Blk; Nav, Premium, Convenience, HK Dinan Stage 2 +PPK /// BMW PE /// VRSF CP /// K&N /// Koni Sports /// RSFB Inserts /// MPS4S 225/255 /// Other Stuff
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10-11-2018, 10:47 AM	#9
ONLYA6 Second Lieutenant 217 Rep 210 Posts Drives: '20 X3M '19 M2C Join Date: Mar 2016 Location: West Virginia iTrader: (0)	AA will be releasing their single mid-pipe soon. I spoke with them last week. __________________ 2020 X3MC, 2019 M2C '14 F-150 Tremor, '99 Mustang Turbo
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