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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > B58 Turbo Engine / Drivetrain / Exhaust Modifications > B58 340i Exhaust, Straight Pipe, Catless DP
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      04-01-2019, 12:31 PM   #1
CodyReviews
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Hey everyone, There are several videos floating around with small grainy 2 second clips of B58s with "custom exhaust" but no one really goes into detail as to what they have. I have started a Youtube channel Cody Reviews where I try and detail my modifications for my 340 and give my opinion as a concerned car enthusiast.

I did several different snippets, but I am working on putting them together. After some constructive criticism I realize that in the future, shooting in landscape mode is a MUST.

My exhaust is broken down as follows:
Turbo>VRSF 4.5" Catless Downpipe>3" Midpipe>Y-Pipe(3"in/2.5"out)>2.5" Pipe>4" Exhaust Tips
**NOT TUNED YET**


When I got the car, it had the mufflers already cut out. I put the downpipe on and it REALLY took the "suffocation" sound from the turbo. It sounds like a diesel truck spooling coming down from 6K RPMS. That alone was great couple with the no muffler, it was the right tone, but it was missing something... I didnt have the loud pops, the big bang, the notorious burble I had in my N54. So I Decided it was time to change that.


The performance shop in my city racked it and for a very fair price, cut out the long resonator that restricts the flow. The owner of the shop convinced me that I should leave the small square resonator on and "gut it." I agreed as I was partly scared of the drone. He left the smaller resonator shell on there while gutting the baffles inside and straight piped the rest!

Let me tell you, I think it sounds amazing. Substantially better than my N54 and N55 setup's. I think its coupled with being a closed deck and having the BMS cone air filter in the front. That alone brings a great induction sound. But that's for another review. I posted my review video below. Unless in sport or sport+ there is absolutely no drone while doing 80 on the interstate, I am still getting 32 mpg in EcoPro.

The first part of the video was prior to the shop cutting out my resonators. I did have some clips of me rambling that included the inside the cabin sound. So bare with me as I am learning this narration by trial and error.

Video:



Also, if you want to skip the cold starts and just hear the final product, skip to the end of the video where you can hear the insane back fire. The sweet spot is down shifting from 3rd to 2nd and 2nd to first. Anything in those gears coming down from 6K RPMS is absolutely bonkers. I would recommend this setup to anyone. I wish I would have caught a video of the lady dropping her purse on the side walk in my neighborhood, wasnt even doing over 30. It could easily be confused for gunshots.

If you like my video please like and subscribe! I am going to try and partner here soon with a tune company, so subscribe for more videos!
If you have any recommendations/request please feel free to DM me!
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Last edited by CodyReviews; 04-01-2019 at 01:03 PM..
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      04-01-2019, 12:48 PM   #2
jalkster
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Quote:
Originally Posted by CodyReviews View Post
After some constructive criticism I realize that in the future, shooting in landscape mode is a MUST.
Yes haha. Cool to see a b58 guy putting out videos. The b58 will be a hot topic once the Supras start hitting the streets. Good move to get in early.
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      04-01-2019, 12:52 PM   #3
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Where's the link to the exhaust video?
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      04-01-2019, 01:02 PM   #4
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Quote:
Originally Posted by Thus View Post
Where's the link to the exhaust video?
Well I left the house and it wsa working fine, but I do believe I forgot to save the visibility of the video itself on youtube... so with that being said. It will be fixed when I get home from work around 2AM. My apologies
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      04-01-2019, 04:04 PM   #5
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Nice! I'll look out for your video and subscribe.

I actually straight piped my X3 today from the DP (VRSF catted) back. Thing sounds amazing. Just waiting for more intakes/ filters to be available so I can throw one on for more sounds haha but for now I'm extremely happy.
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      04-01-2019, 07:29 PM   #6
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Sub'd. I have quite a few videos on my channel: https://www.youtube.com/c/b58-340i
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      04-02-2019, 06:56 AM   #7
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Sub'd. I have quite a few videos on my channel: https://www.youtube.com/c/b58-340i
Awesome! I subbed
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      04-02-2019, 06:57 AM   #8
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Updated with video!
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      04-02-2019, 02:17 PM   #9
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Would have been nice to focus on exhaust noise more than the burbles. I have a muffler delete and I *think* gutting my downpipe will help bring a more throaty sound, but not sure. It's all bass right now and I want less of a boomy tone. It's hard to get that with a turbo in the way though.

Next time do an actual drive by at partial and/or full throttle instead of just tapping the pedal to make it backfire.
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As long as 3-pedals are an option, I will exercise my right to suffer the handicap and indignity of slower shifts and reaction times.
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      04-03-2019, 06:47 PM   #10
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I would add some sort of resonators back in the clean up and refine the sound, I went the same route as you and regret all the money I spent just to add resonators back in.
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      04-03-2019, 06:52 PM   #11
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Sounds good man. Only thing I would do is add a resonator (small) to get rid of some of the rasp, but it sounds nice! I bet all your friends can hear you coming from blocks away haha
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      04-03-2019, 06:54 PM   #12
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Quote:
Originally Posted by grassy_91 View Post
Sounds good man. Only thing I would do is add a resonator (small) to get rid of some of the rasp, but it sounds nice! I bet all your friends can hear you coming from blocks away haha
It's so loud the microphone hears it S rasp, but it's really not.
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      04-03-2019, 07:23 PM   #13
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Quote:
Originally Posted by CodyReviews View Post
It's so loud the microphone hears it S rasp, but it's really not.
Makes sense. Iíve got a catless dp with the Dinan Midpipe and itís pretty clean sounding. I might make a YouTube video as well so that others can compare and contrast before choosing which exhaust setup to go with. I know user B58 has a few good videos as well
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      04-05-2019, 01:46 AM   #14
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Quote:
Originally Posted by grassy_91 View Post
I know user B58 has a few good videos as well
Thereís no love for the B58 and 340i so I had to make more videos. People are still stuck on the 335i haha.
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      04-06-2019, 12:21 PM   #15
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Great sound!

Hey so I recently got.. pretty much your exact car, sterling grey; m-sport; red interior and the same wheels haha, and I currently have a muffler delete and just bought a ER 4.5" Downpipe and with the muffler delete I have a little bit of drone and the annoying thing is everytime I floor it I just hear a loud whooshing sound. I am wondering with the downpipe, will the wooshing sound go away and does the drone get louder or better with less pressure in the back with the DP? Thanks.
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      04-06-2019, 12:59 PM   #16
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Quote:
Originally Posted by MrSamo07 View Post
Hey so I recently got.. pretty much your exact car, sterling grey; m-sport; red interior and the same wheels haha, and I currently have a muffler delete and just bought a ER 4.5" Downpipe and with the muffler delete I have a little bit of drone and the annoying thing is everytime I floor it I just hear a loud whooshing sound. I am wondering with the downpipe, will the wooshing sound go away and does the drone get louder or better with less pressure in the back with the DP? Thanks.
I'm wondering if just doing a resonator delete with your DP (keeping stock mufflers, valve control) would have been a better option?
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      04-06-2019, 01:02 PM   #17
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I'm wondering if just doing a resonator delete with your DP (keeping stock mufflers, valve control) would have been a better option?
Bro the valve control doesn't work effectively with exhaust, because it starts rattling and it can't handle that much air coming out when closed. I opened my valve and disconnected it.
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      04-06-2019, 01:05 PM   #18
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Quote:
Originally Posted by MrSamo07 View Post
Quote:
Originally Posted by j1980mac View Post
I'm wondering if just doing a resonator delete with your DP (keeping stock mufflers, valve control) would have been a better option?
Bro the valve control doesn't work effectively with exhaust, because it starts rattling and it can't handle that much air coming out when closed. I opened my valve and disconnected it.
Oh wow. I've got an ER catted DP with stock exhaust and I can control the valve just fine. Mine is an X3 M40i. Not sure if that should make a difference here?
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      04-11-2019, 08:22 PM   #19
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      04-12-2019, 06:23 AM   #20
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Quote:
Originally Posted by MrSamo07 View Post
Quote:
Originally Posted by j1980mac View Post
I'm wondering if just doing a resonator delete with your DP (keeping stock mufflers, valve control) would have been a better option?
Bro the valve control doesn't work effectively with exhaust, because it starts rattling and it can't handle that much air coming out when closed. I opened my valve and disconnected it.
Mine is fine with no rattles. Running MPPSK with Catless downpipe
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