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Technical Topics B48 4-Cylinder Turbo Engine / Drivetrain / Exhaust Modifications Question regarding B46/B48 Catless Downpipe

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      05-11-2020, 02:09 PM   #1
Michaeltv100
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Question regarding B46/B48 Catless Downpipe

Hello, I'm about to buy the Evolution Racewerks b46 downpipe and I was wondering if anyone had some experience with it regarding if you'll need to buy an 02 and an EGT bung.

Anything helps, thanks.
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      06-19-2020, 11:57 PM   #2
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I ordered the ER b46 downpipe from xph and opted to not include the bungs. From my understanding the bungs are just small bolts that serve as placeholders, I hope I'm not wrong. Anyhow, it's supposed to be delivered Tuesday. I'll update on how the install goes.
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      06-20-2020, 04:27 AM   #3
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A catless DP will throw the emissions cel light. You'll need a tuner to turn that off and tell the ECU to ignore the error message.

Otherwise it'll likely go into limp mode.
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      07-07-2020, 11:05 AM   #4
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Late reply, but I figured you might want an update. Got the downpipe in last week without the bungs, turns out I was right. The bungs are just little bolts that close off the holes for the o2 sensors. The install went perfectly fine, took a little more than an hour. It’s a real easy job if you have access to a lift. Rn I just have the downpipe and bm3 stage 2 flashed. Here’s a link to a sound clip. I don’t know how to post video on the forums https://drive.google.com/file/d/1j9WlAZbVWZ2jHATC4wMlZBfosR2D3b28/view?usp=drivesdk
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      07-10-2020, 03:04 PM   #5
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I've had a JB+ for a week now being tempted by BM3. worth it??
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      07-10-2020, 05:26 PM   #6
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Quote:
Originally Posted by chris_portimaog20 View Post
I've had a JB+ for a week now being tempted by BM3. worth it??
JB+ to BM3 will be worth it.
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      07-10-2020, 08:30 PM   #7
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Quote:
Originally Posted by chris_portimaog20 View Post
I've had a JB+ for a week now being tempted by BM3. worth it??
I have bm3 for my 2020 330i. send me your ig I can send you some video's
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      07-11-2020, 01:51 PM   #8
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Quote:
Originally Posted by Punkwrock View Post
I have bm3 for my 2020 330i. send me your ig I can send you some video's
thanks but I might be one of few people still alive without ig.
but do you guys know if the OBD to ethernet for F30s on amazon will work with G20?
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      07-11-2020, 04:24 PM   #9
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Quote:
Originally Posted by chris_portimaog20 View Post
Quote:
Originally Posted by Punkwrock View Post
I have bm3 for my 2020 330i. send me your ig I can send you some video's
thanks but I might be one of few people still alive without ig.
but do you guys know if the OBD to ethernet for F30s on amazon will work with G20?
yes it will because that's the one I bought
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      07-11-2020, 04:57 PM   #10
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like this one?
https://www.amazon.ca/RJ45-Ethernet-...4503854&sr=8-6
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      07-11-2020, 06:57 PM   #11
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Quote:
Originally Posted by chris_portimaog20 View Post
that's the exact one I got.
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      07-11-2020, 08:12 PM   #12
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Quote:
Originally Posted by Punkwrock View Post
that's the exact one I got.
perfect. ordered also got the confirmation from protuningfreaks
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      07-11-2020, 08:36 PM   #13
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Quote:
Originally Posted by chris_portimaog20 View Post
Quote:
Originally Posted by Punkwrock View Post
that's the exact one I got.
perfect. ordered also got the confirmation from protuningfreaks
I posted a few videos on YouTube. Andrew Arseneau is my username
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      07-14-2020, 10:58 AM   #14
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Quote:
Originally Posted by meetvpatel_ View Post
I ordered the ER b46 downpipe from xph and opted to not include the bungs. From my understanding the bungs are just small bolts that serve as placeholders, I hope I'm not wrong. Anyhow, it's supposed to be delivered Tuesday. I'll update on how the install goes.
Congrats
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      07-12-2021, 06:14 PM   #15
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I got the B46 Catless Downpipe for my G20 330i. I had to take it to a shop to install and even then, they said that the bolts don't align perfectly for the new downpipe. I got the bung on mine so I can use the O2 sensors and those seemed to fit fine.

I've been running with a CEL so far since I need to change my oil and don't want to clear the code until I finish that. I'll be clearing it with a JB4.

So far great sound, but I think I have an exhaust leak from an improper install. Will be completing it when I order a catback exhaust. So far I've been documenting the process on my Youtube channel Kame Society and I have a sound clip at the end of my ER install video (starting at 12:29).
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      07-13-2021, 04:06 AM   #16
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Hi
following this thread.
I have a 330e ( exactly the same ICE as 330i). I have downpie, hybrid turbo stage 2, and inlet.
Previously I have stage 1 tune, (400hk) :
How important is it to have anew software done? I have CEL but engine runs good anyways.
Can I damage the engine?
From what i know, and heard, I should have something like 450-460 crank (System power) in my car now. To be honest it doesn't feels like additional 50-60hk from stage 1

Have anyone done something similar? (hybrid turbo)
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      12-09-2021, 09:22 AM   #17
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Quote:
Originally Posted by Punkwrock View Post
Quote:
Originally Posted by chris_portimaog20 View Post
I've had a JB+ for a week now being tempted by BM3. worth it??
I have bm3 for my 2020 330i. send me your ig I can send you some video's
Hey bro can u send me a views vids too on Instagram @bmwcodes
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      12-09-2021, 04:25 PM   #18
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Quote:
Originally Posted by Icemachineboss View Post
Hi
following this thread.
I have a 330e ( exactly the same ICE as 330i). I have downpie, hybrid turbo stage 2, and inlet.
Previously I have stage 1 tune, (400hk) :
How important is it to have anew software done? I have CEL but engine runs good anyways.
Can I damage the engine?
From what i know, and heard, I should have something like 450-460 crank (System power) in my car now. To be honest it doesn't feels like additional 50-60hk from stage 1

Have anyone done something similar? (hybrid turbo)
You'll need a new custom tune to utilise the potential of your new turbo. Else it's a waste of money and probably counter productive as well.

Quote:
Originally Posted by g20_shub View Post
Hey bro can u send me a views vids too on Instagram @bmwcodes
I believe he sold his 330i and got an M340i.
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      01-10-2022, 10:26 PM   #19
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Quote:
Originally Posted by VipinLJ View Post
Quote:
Originally Posted by Icemachineboss View Post
Hi
following this thread.
I have a 330e ( exactly the same ICE as 330i). I have downpie, hybrid turbo stage 2, and inlet.
Previously I have stage 1 tune, (400hk) :
How important is it to have anew software done? I have CEL but engine runs good anyways.
Can I damage the engine?
From what i know, and heard, I should have something like 450-460 crank (System power) in my car now. To be honest it doesn't feels like additional 50-60hk from stage 1

Have anyone done something similar? (hybrid turbo)
You'll need a new custom tune to utilise the potential of your new turbo. Else it's a waste of money and probably counter productive as well.

Quote:
Originally Posted by g20_shub View Post
Hey bro can u send me a views vids too on Instagram @bmwcodes
I believe he sold his 330i and got an M340i.
Hey bro my evolution werks catless downpipe should be coming in tomorrow . Do you know if it'll throw a cel? If so is there any 02 sensors/spacer known to work? Thanks in advance
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      01-11-2022, 09:10 AM   #20
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Quote:
Originally Posted by g20_shub View Post
Hey bro my evolution werks catless downpipe should be coming in tomorrow . Do you know if it'll throw a cel? If so is there any 02 sensors/spacer known to work? Thanks in advance
The downpipe will throw a code unless your car is flash tuned.

As far as i am aware, active autowerke is the only company that offers B46 catted downpipes with a no check engine light guarantee
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