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Technical Topics B48 4-Cylinder Turbo Engine / Drivetrain / Exhaust Modifications BMW 330i G20 Exhaust

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      10-31-2020, 05:44 AM   #1
erik_sark
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BMW 330i G20 Exhaust

What's up guys. I got a muffler delete in my 2020 BMW 330i B48 earlier in the year and have recently bought a catless downpipe. I was wondering if adding that would make my exhaust sound better. Does anyone have clips??
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      10-31-2020, 06:02 AM   #2
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The catless DP will definitely make it sound louder. You'll hear the turbo whistle more too.

You'll need a tune to remove the cell light that will be triggered by having no cat.

Another consideration is depending on which market you're in - you may have the dreaded OPF filter. By removing the cat, you're likely to destroy the OPF filter which is positioned just after the DP
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      10-31-2020, 09:29 AM   #3
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you are going to have drone with muffler delete and downpipe
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      10-31-2020, 09:50 AM   #4
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Quote:
Originally Posted by erik_sark View Post
What's up guys. I got a muffler delete in my 2020 BMW 330i B48 earlier in the year and have recently bought a catless downpipe. I was wondering if adding that would make my exhaust sound better. Does anyone have clips??
In my opinion, catless + muffler delete does not sound good. You're better off getting an axle back. It sounds better
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      11-02-2020, 04:13 AM   #5
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How are you going to pull this off in California?
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      11-02-2020, 04:14 AM   #6
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Originally Posted by helmet91 View Post
How are you going to pull this off in California?
lol😈
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      11-02-2020, 04:15 AM   #7
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Quote:
Originally Posted by Don76 View Post
The catless DP will definitely make it sound louder. You'll hear the turbo whistle more too.

You'll need a tune to remove the cell light that will be triggered by having no cat.

Another consideration is depending on which market you're in - you may have the dreaded OPF filter. By removing the cat, you're likely to destroy the OPF filter which is positioned just after the DP
Do you think it is worth installing the downpipe knowing that? Will it sound good?
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      11-17-2020, 02:24 AM   #8
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Resonator delete
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      11-17-2020, 02:27 AM   #9
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Would it sound good with muffler delete and resonator delete?
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      07-14-2021, 06:10 PM   #10
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Quote:
Originally Posted by Don76 View Post
The catless DP will definitely make it sound louder. You'll hear the turbo whistle more too.

You'll need a tune to remove the cell light that will be triggered by having no cat.

Another consideration is depending on which market you're in - you may have the dreaded OPF filter. By removing the cat, you're likely to destroy the OPF filter which is positioned just after the DP
do you think it's worth it? and is there something i can do to prevent the OPF filter from getting damaged? Will it sound good?
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      07-18-2021, 08:40 AM   #11
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Quote:
Originally Posted by erik_sark View Post
What's up guys. I got a muffler delete in my 2020 BMW 330i B48 earlier in the year and have recently bought a catless downpipe. I was wondering if adding that would make my exhaust sound better. Does anyone have clips??
Wouldn't this be a question to ask BEFORE buying a down pipe?
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      08-11-2021, 06:27 AM   #12
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Quote:
Originally Posted by Avaley View Post
you are going to have drone with muffler delete and downpipe

That's correct. I have seen many people do res delete, lots of drone after.
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      09-01-2021, 09:05 PM   #13
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Quote:
Originally Posted by erik_sark View Post
Would it sound good with muffler delete and resonator delete?
better find a resonated pipe
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      09-27-2021, 11:59 AM   #14
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Quote:
Originally Posted by egor.bruilo1 View Post


Resonator delete
What was removed exactly everyone says something different…was it the OPF or more towards the front there's a smaller one. People are saying removing the OPF causes issues?
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      09-27-2021, 04:55 PM   #15
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Went to the muffler shop and the guy said I need a mid pipe?
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      09-27-2021, 06:07 PM   #16
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Quote:
Originally Posted by VICG20M View Post
Went to the muffler shop and the guy said I need a mid pipe?
They were probably referencing removing the resonator in your 2nd pic. This can be removed on the B46 for a bit more sound.
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      09-27-2021, 06:25 PM   #17
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Quote:
Originally Posted by njfoses View Post
Quote:
Originally Posted by VICG20M View Post
Went to the muffler shop and the guy said I need a mid pipe?
They were probably referencing removing the resonator in your 2nd pic. This can be removed on the B46 for a bit more sound.
That's what I thought but everyone here says to not remove the OPF. The guy at the shop said from thr OPF forward to the tips and do a Y pipe and quoted me $400…
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      09-27-2021, 06:29 PM   #18
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Quote:
Originally Posted by VICG20M View Post
That's what I thought but everyone here says to not remove the OPF. The guy at the shop said from thr OPF forward to the tips and do a Y pipe and quoted me $400…
There is no OPF on the B46(US spec cars.)
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      09-27-2021, 06:34 PM   #19
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Quote:
Originally Posted by njfoses View Post
Quote:
Originally Posted by VICG20M View Post
That's what I thought but everyone here says to not remove the OPF. The guy at the shop said from thr OPF forward to the tips and do a Y pipe and quoted me $400…
There is no OPF on the B46(US spec cars.)
SMH okay so all I needed to do was get rid of that resonator in the 2nd picture? Won't cause any issues with how the car drives just going to add noise?
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      09-27-2021, 06:51 PM   #20
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Quote:
Originally Posted by VICG20M View Post
SMH okay so all I needed to do was get rid of that resonator in the 2nd picture? Won't cause any issues with how the car drives just going to add noise?
Won't cause any issues or throw any codes.
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      09-27-2021, 07:01 PM   #21
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Quote:
Originally Posted by njfoses View Post
Quote:
Originally Posted by VICG20M View Post
SMH okay so all I needed to do was get rid of that resonator in the 2nd picture? Won't cause any issues with how the car drives just going to add noise?
Won't cause any issues or throw any codes.
Thanks I appreciate it I'm still learning about these cars I had a S4 and it was the same thing just remove the resonator but things seem to be a little more complicated with this car or it's just me getting old..
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      11-05-2021, 11:13 AM   #22
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Quote:
Originally Posted by VICG20M View Post
Quote:
Originally Posted by njfoses View Post
Quote:
Originally Posted by VICG20M View Post
SMH okay so all I needed to do was get rid of that resonator in the 2nd picture? Won't cause any issues with how the car drives just going to add noise?
Won't cause any issues or throw any codes.
Thanks I appreciate it I'm still learning about these cars I had a S4 and it was the same thing just remove the resonator but things seem to be a little more complicated with this car or it's just me getting old..
yea don't listen to anyone saying it will drone or throw up any codes for the resonator delete. I removed mine about 3 months ago and still no problems just make sure you go to a professional muffler shop and ask them to give you your resonator after they remove it.
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