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Technical Topics B58 6-Cylinder Turbo Engine / Drivetrain / Exhaust Modifications Muffler delete or Cat less down pipe

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      09-26-2021, 10:27 AM   #1
rozaylex
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Muffler delete or Cat less down pipe

Hi All,
Just got a 2020 M340i and was wondering what is better for sound, pops, burbles, ect.
Should I just do a muffler delete, but take away the valve that switches between modes or just replace the downpipe with a cat less one?
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      09-26-2021, 05:39 PM   #2
blu_g20b58
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Matter of your taste in sound. Look up videos on each. I went the muffler delete route with valve delete too and it sounds amazing but everything has its pros and cons.
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      09-26-2021, 05:50 PM   #3
Cityofangeles323
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Stock muffler and catless downpipe if you're not planning on doing a full exhaust - at least you'll get a little performance gain with the downpipe. That way you can still be stealth in comfort but still crackle and pop in sport plus!
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      09-27-2021, 08:42 AM   #4
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anything but a muffler delete in my opinion.
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      09-27-2021, 01:52 PM   #5
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Can some of you post your updated sounds? I'm in the UK so have to keep the stupid PPF/OPF, but I'm interested to hear what it sounds like with a few changes.
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      09-27-2021, 02:42 PM   #6
chenry
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Muffler delete


CG-Precision DS1 Catted DP through stock muffler (this is my car) – but keep in mind it is also a 2020 with the original more aggressive exhaust note and a Mission Performance stage 2 tune
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