E92 M3 stock exhaust / emissions question

NiceM3 · 05-04-2025, 07:17 PM

Moving to DFW tomorrow and am having a really hard time fitting my stock exhaust in my car with other items I will need.

Do people or shops lend their stock exhaust set ups for emissions testing? From what I've read, DFW still does the sniffer test.

Is it easier to borrow a stock Muffler? Can I just bring my stock mid-pipe?

Any and all advice is very welcome!

CCase · 05-05-2025, 11:24 PM

Muffler doesn’t matter but the front cats and tune do. O2s have to show ready on the scanner or it won’t pass. Not California serious but certainly annoying, especially when cat delete is the best way to make power on the s65 platform.

Bald Guy · 06-04-2025, 03:47 AM

Welcome to the DFW area. Hope you got it figured out.

05-04-2025, 07:17 PM	#1
NiceM3 Enlisted Member 11 Rep 48 Posts Drives: 2011 Frozen M3 and 07 335i Join Date: Aug 2015 Location: Dallas TX iTrader: (2)	E92 M3 stock exhaust / emissions question Moving to DFW tomorrow and am having a really hard time fitting my stock exhaust in my car with other items I will need. Do people or shops lend their stock exhaust set ups for emissions testing? From what I've read, DFW still does the sniffer test. Is it easier to borrow a stock Muffler? Can I just bring my stock mid-pipe? Any and all advice is very welcome!
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05-05-2025, 11:24 PM	#2
CCase Enlisted Member 21 Rep 38 Posts Drives: 95 M3 Join Date: Apr 2011 Location: DFW, TX iTrader: (0)	Muffler doesn’t matter but the front cats and tune do. O2s have to show ready on the scanner or it won’t pass. Not California serious but certainly annoying, especially when cat delete is the best way to make power on the s65 platform.
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06-04-2025, 03:47 AM	#3
Bald Guy Imperfect 489 Rep 4,648 Posts Drives: '25 C8 Z06s and more! Join Date: Apr 2009 Location: Plano, Texas iTrader: (0)	Welcome to the DFW area. Hope you got it figured out.
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