BMW N55 Downpipe INSTALL DIY | VRSF Straight Pipe m235i | Sound Clips

Downpipe: tinyurl.com/n55downpipe
Bootmod3: tinyurl.com/bootmod3
The n55 stage 1 tune from bm3 is an awesome upgrade especially once you have all the necessary mods. I love how the BMW m235i is more responsive especially at the upper rev ranges. 100% worth it
00:00 - Intro
00:22 - Catless vs High Flow Cats
01:26 - Why VRSF
01:36 - Cost
02:22 - Clamps & Tools
02:48 - O2 Sensor removal
03:49 - Jack it up
03:58 - Under Panel removal
04:06 - Downpipe removal
05:40 - O2 Sensor Clips
06:20 - Gasket Removal
06:33 OEM vs Aftermarket
08:12 - O2 Sensor Swap
09:02 - Clamp Install
10:07 - Downpipe Install
11:27 - O2 Sensor Clips reinstall
12:11 - Sound Clips
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Charge Pipe: tinyurl.com/reytwpe
Boost Pipe: tinyurl.com/v73dhbs
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Tools to Get the Job Done
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Drill Kit: amzn.to/3hrcSvL
Impact Sockets: amzn.to/2YAdbNo
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Magnetic Pan: amzn.to/32uemiC
#bmw #vrsf #vrsfdownpipe #m235idownpipe #bmwdownpipe #bm3 #m235i #bootmod3 #2series #stage1 #bmwmods

[@rayland9305]

You have some of the best install videos I've ever came across. Good work.

[@TunedByJ]

Just purchased this same downpipe right now, can’t wait to hear the difference

[@greggersch]

Great video. I watched a lot of different downpipe videos, but I kept coming back to this one for the useful details. I actually just swapped the original cat back into my M2. Catless was just too obnoxious.

[@sleepyboi3695]

I can’t find any videos on B46 downpipe but this will be close enough to help thank you!

[@connormcfarlane2335]

Really good video mate, great info! Thankyou

[@FritzRamos]

You're welcome. Glad you found it useful

[@SteveWeltman]

As always Fritz you put out some great content! Great job on the catless DP. I heard some exhaust rattles on catless. You may have a loose fitting for an auxiliary part like cable hold or something. Love the content! Great work!

[@FritzRamos]

Thanks for the tip I'll look into it. Hope you are doing well.

[@chriscollado799]

@@FritzRamos I had this same issue with rattling sound and it turned out to be the exhaust valve pin busted. just wired it open permanently.

[@MrVuittonDon]

@@chriscollado799 what is a exhaust valve pin? What cause this exactly?

[@momp87]

Great guide! Thank you!

[@FritzRamos]

Glad it was helpful!

[@trentthibeault1234]

hey man, thanks for all of the helpful advice! just to make sure, did the downpipe come with the bungs already installed or is that something you had to purchase elsewhere? if it was a separate purchase, could I get away with just having an ugly engine light while still maintaining maximum power output?

[@piruffiters]

Good video with explanation and installation of the catless downpipe! You should check the mount as there is something rattle. I would also recommend disabling the cold start now as you don't have a catalyst to heat up. about the exhaust sound, you didn't activate the burbles with bm3??

[@FritzRamos]

Thanks for the tip! I'll look into it and get back to you

[@xxdizannyxx]

Fake burbles are gay. I turned them off on my m235i

[@vasilehincu281]

Thx mate ❤

[@rollingonland]

Hey Fritz, amazing videos! I have been using your videos for my own DIY installations. Just one question, similar to yours I have a rattling noise on cold start ups. Is that normal and how do I get fix that sound? Thanks!

[@FritzRamos]

After double checking I notice that my clamp wasn't properly seated and so it was a little loose. Try loosening it up, ensure its seated correctly and then lock it down .

[@Shogun1982]

Thanks for this vid! I'm considering replacing my downstream O2 sensor because I keep getting consistent -3% to -7% on my Long Term Fuel Trim from my OBD II port reader chart/values. I feel a lack of power from, what I gather, is the computer compensating from a false rich sensor signal, erroneously leaning out the air/fuel mix too much. Anyways, this could go a long ways in helping me out. Thanks!

[@FritzRamos]

Did you code out the sensor or are you using a spacer?

[@Shogun1982]

@@FritzRamos Hey, sorry for the delayed reply. Turned off notifications due to trolls. Nope, everything is bone stock. No coding out and no spacer installed. The rich trim hasn't tripped a CEL or thrown up any codes, according to my scanner.

[@frederickboisclair]

I’m doing this exact downpipe install this week. What size vclamps and anti sieaze did you use?

[@rkmillerjr53]

Thanks!

[@FritzRamos]

Thank you! Glad the video was helpful

[@user-pu8ri5wm5g]

Hello, what size did you order in Vband please? Thanks again for the tutorial!! I'm going to do that quickly later on my engine ;)

[@garett2892]

Nicely done. Going to go with a. Fabspeed. Did u get any codes from the sensors? And can you link the v bands And the gasket??

[@FritzRamos]

Thanks! You're getting a good one there. You might be able to reuse the gaskets, but have some ready just in case

[@JohnDoe-sc3oo]

I see you said you got the clamps from the stealership, did you also get the gasket from there?

[@Gchild-mos0311]

Hello watching all your videos waiting for delivery of my 2016 235i 30k miles with 70k warranty lol. How are you dealing with the smog situation in Cali? I want to do a muffler and cat delete also. Carfax says mine just passed emissions this year. Car was only ever in Cali. I’m in SoCal

[@IJ-gk9zc]

Do I need to replace the gasket looking to install tonight and not really trying to wait 5 days for that.

[@jasonferkh4975]

Did you have check engine light issues going with the catless? Im running a jb4 on mine and i have this same downpipe but haven't installed it yet.

[@NickEnglishPhotography1]

How important is it that the v-band teeth point forwards (towards the engine not the exhaust) as I have a feeling I did mine the other way :-/

[@michaelchang9961]

Hey where did you get the clamp with the teeth I don't see it on the shop site?

[@watchonthetoiletchannel4741]

Can someone give Some advice. I have for a m235i Two downpipes on the shelf But dont know which one to put on the car. One is a Wagner 200 cell catted downpipe, Its wide. The other one is a catless , But narrow from begin to end. What Will be the differences And effect?

[@paws8031]

hey, whot about oxygen sensors ? they are deleted or just you take out the cat, and you don't have any errors according to low efficienty of cataletic converter ?

[@Gchild-mos0311]

What is the size of the lower downpipe clamp? Looks smaller than top side. Side ran out of clamps so need to get separate. Looking at it the one they are sold out even looks different no teeth.

[@DemonoIogic]

Hi Fritz, I see you still own the m235i! Do you still run the vrsf straight pipe and did you run into any problems on the longterm? Did you end up getting a tune at a later point for the straight pipe or not? Thanks! Been subbed for a while and your vids are really interesting!

[@FritzRamos]

Thank you! No problems as of yet. I am running a stage 2 tune from BM3 and I would say that it's perfectly fine to run it like that as a daily.

[@mikeyryapolov8618]

Did it take a few days to adjust to the downpipe? Like anything unusual at first

[@Remyp388]

Nice

[@FritzRamos]

Thanks

[@garett2892]

Will bm3 pass inspection in states that do obd2 inspections?

[@bgsunny9374]

What should I do if the clamp from vrsf is to hard to clamp close on the turbo side. It does not close enough to get the bolt through

[@kennethtuvera1270]

How much hp do you think it’ll add if I run Mhd stage 2 + downpipe?

[@christianpalmer9782]

Hey great content man, I am a little confused on which parts to buy for the downpipe. Does the V-band clamp with the teeth come with the downpipe? The only V-band clamp on VRSF's website is the turbo to downpipe V-band clamp. Appreciate the help.

[@FritzRamos]

Looking back on it, I would try to reuse the ones on the car. If you really need to replace them get it from BMW the quality is better.

[@Enzonius]

I disagree with trying to reuse the OEM V-band with the teeth. Trying to remove the oem one will distort the metal gasket and then it will not seal properly on you car. Learned this the hard way sadly. Just bite the bullet and buy a new clamp from BMW. Will make the installation easier and you will not have to deal with leaks.

[@seanyoung3535]

Good video. Arent you in CA? Far as u know there is no legal catless dp. What or how do you plan on getting around smog check

[@FritzRamos]

Just hang on to the stock one 😅

[@profitwithme497]

Does anyone know where to get the clamp with teeth for downpipe to exhaust????????????

[@alanmeris388]

Great video bro! What size v band clamp did you use for the lower part of the downpipe? Where do you recommend buying it from?

[@FritzRamos]

Thank you. I just went to the dealership for the clamps.

[@nedajuh]

@@FritzRamosAre the ones you showed in the video both the same? Or they have different part numbers? VRSF says one clamp is recommended (for Turbo to Downpipe) but I want to change both to be safe.

[@N55Hugo]

@@nedajuhdid you find the other size for it

[@nedajuh]

@@N55Hugo I ended up buying clamps from BMW, it was 30$ each at my local dealer. They’re VBand though which is good

[@seollenda]

You have an idea on what the power advantage is for running a catless? I wanna go catted b/c of the quieter sound and not having to worry about passing emissions

[@FritzRamos]

There would be a slight enge in power for sure because of the free flow but the exact number I don't know. Ill look into it and get back to you.

[@seollenda]

@@FritzRamos Great, thank you!

[@daniellucatero-jimenez.1440]

would u say it’s a lot quicker now ? Recently got a 235i & am looking at getting the downpipe, it’ll add the sound i’m looking for. I’ll worry about the CEL next year 😉. Thank you for showing an in depth guide!

[@ironmerc225]

Highflow cat would be a better option, mines getting installed right now

[@user-StevinQ]

I have a 2012 bmw x5 35i is that going to be the same?

[@bcady16]

What muffler and / or exhaust do you have? Sounds great !!!

[@FritzRamos]

Surprisingly it's OEM

[@andressaavedra1650]

Hi! Great video. I hear a rattle sound after catless in your video. Me too installed this same downpipe in my m235i and have the same rattle sound. Its the only thing that bothers me. Will you try to fix it?

[@FritzRamos]

I will someone made a specific suggestion. Once I get underneath the car I will update you.

[@andressaavedra1650]

@@FritzRamos Thanks! Many people say that its the watesgate. In my case the rattle its only in cold start. Good luck

[@cstrotheide4337]

Could be the vrsf welded logo, Sense it's not tack welded on all points?

[@chanzbeltran202]

It’s from the exhaust valve, leave the car on in sport and disconnect it, it will always keep it open and won’t throw a code

[@jemmisviolonchi2623]

@@chanzbeltran202 exactly! I changed mine, its a little part called a fixing bow, its a 20$ cad part, and now I have no rattles, i drive a m240xi

[@kthanks8045]

Fritz you’re not xdrive right?

[@TonySayavong]

Great vid, has anybody used a o2 bypass to get around throwing the code? Thanks

[@FritzRamos]

Thanks. From what I've seen in the comments using a bypass is a hit or miss. If plan on tuning with something like BM3 it's best to bypass it using that software.

[@TonySayavong]

@@FritzRamos couldn’t find it, appreciate it Fritz. Best of wishes may god bless

[@dndxander]

That bottom clamp won’t come off I’ve tried hammering but nothing happens!!!

[@georgecielo6814]

hey Fritz where did you bought the clamp for the lower part of the downpipe?

[@FritzRamos]

I just went to my local dealership.

[@virachai336]

Hey do you think by adding the defouler would help get rid of the cel ?

[@virachai336]

Update: installed one and it work !!

[@garett2892]

Fritz have you had your inspection yet? If so how did it go and what did you do

[@FritzRamos]

Sorry, not yet

[@derekschommer1465]

Does it come with the bottom clamp? They only suggest the turbo to downpipe clamp and gasket when ordering

[@FritzRamos]

No the clamp is not included. I found it was best to get new ones from the dealership.

[@Feasel091390]

That rattle on the catless, was that a heat shield or is that a rattle u get after changing it

[@FritzRamos]

The clamp was a little loose

[@andreww2243]

hi Fritz do you have the part numberr for the clamp used from the downpipe to the midpipe?

[@flatcheetos7422]

I need this as well fritz if you could respond please

[@lizandrohernandez6524]

Respond plz

[@MrVuittonDon]

How can I remove the check engine light regarding the downpipe/custom exhuast fabrications? Is there a way to remove the codding ONLY for the exhuast part and not the check engine entirely? Is there a sensory cap I cam plug in to trick the system? (2018 BMW 230i F22) PLEASE HELP 🙏🏼🙈

[@BimmertechG01]

To my knowledge flash tunes like MHD remove the CEL from catless exhaust systems by changing the O2 parameters. Basically telling the car that the lack of conversion is normal operation, rather than just entirely suppressing check engine lights. I could be wrong, just what I've gathered regarding the CEL.

[@badylvn]

Hi from France! i have a question i ordered the vrsf catless downpipe for a m235i from 2015 but on the vrsf website i only find the turbo to downpipe v band but not the second one with the teeth.. Could you tell me where i can get it please

[@kevinspicy3126]

Salut ! If I am not mistaken the OEM ref of the lower screw clamp is 18307620349. I am located in France too, and personally buy OEM from Hubauer-shop.de. However, on the VRSF website they sell a pair of clamps. So if not already the case I suggest you send VRSF a message to confirm with them that the pair is indeed both the Turbo to DP clamp as well as lower clamp. Let me know how the catless works, I have been thinking about buying one but I kinda feel annoyed by the "Contrôle Technique" hassle.

[@FritzRamos]

Try what Kevin suggested and I would suggest going with the OEM clamps they're better quality.

[@jensongeorge100]

In states (NC, in my case) that has emission requirements, do you know if a vehicle that has a catless downpipe and bootmod flash, the vehicle will pass emissions?

[@FritzRamos]

In CA emissions is every 2 years. I've heard people just keep their old cat and detune once their due 😉. What's the interval in NC?

[@jensongeorge100]

@@FritzRamos yearly 😩 … so you’re saying even if there is no MIL and the vehicle is fault free, chances are the it isn’t going to pass.

[@FritzRamos]

@@jensongeorge100 That's crazy. From what I've been told it friends in the shop. In some cases they use a tail pipe meter, in those cases you went pass. Others use only a obd2 scanner as the car runs, depending the software those can be passed. The other option is to run high flow cats, but they do cost more Hope that helps. If you gain anymore insight please share, I'm sure other people would like to know

[@jensongeorge100]

@@FritzRamos I’ll keep an eye out when they do my emissions in March, if they actually use a sniffer, I’m sure it won’t pass, but like you said if they go directly into the obd port, I should be okay. I got an f15 X5 with the N55 and I’d like to go catless but if the result of that is failed emissions, it’s not worth it. Seems like too much work to try and swap out the downpipe every year so I can be legal 🙄 that said, I enjoyed your video. Good work on the M235

[@garett2892]

@@jensongeorge100 hey man did you end up passing inspection?

[@pabloduhcanadian6328]

Hey man great video. I am stage 2 bootmod3 and I am still getting a CEL error code 128901 slow reaction (before cat) for the last 6 months. Any solutions?

[@bodipyles]

Did you turn off catalytic monitors in ur bm3 map config?

[@pabloduhcanadian6328]

@@bodipyles yep! ended up doing that and it worked :)

[@crisantocayabyab192]

Hey Fritz which is better catless downpipe or catted downpipe? Horse power wise . Thanks

[@FritzRamos]

Catless, But if this is your daily and if you are in stop and go traffic then I would suggest catted

[@crisantocayabyab192]

Thank you Fritz for the info 😊👍👌

[@fabianpm541]

Are you running any tune with the down pipe ?? Please answer 🙏🏼🙏🏼🙏🏼

[@oofskzy]

obviously

[@gbass7328]

I would def leave that foam cover off for better heat flow.

[@FritzRamos]

Which cover are you referring to?

[@gbass7328]

@@FritzRamos The foam one @ 3:00 after the plastic cover is taken off. And for any track use I'd leave the plastic one off too.

[@FritzRamos]

Got it. Maybe for the track on a lowered setup but other parts would need to be secured or removed. For a daily I prefer the cover the dirt and water protection is of a greater concern in that situation

[@TheBlackMinecraft18]

Hey i have a m235i in xdrive from 2015, i would like to order a downpipe but i dont know if these dimension will fit because i saw there are two types. Inlet diameter: 95mm Outlet diameter: 76mm Diameter of the outfall - 100 mm

[@FritzRamos]

The manufacturer should have Xdrive designated, but I believe that they're the same

[@kthanks8045]

The m235i is automatically the 4” for vrsf

[@kthanks8045]

If u go vrsf, the website will give you two model options and it will automatically change the dimensions to fit your model but the m235i f22 is 4” diameter

[@yeisonmunera8701]

Hi after installing my downpipe to my bmw x5 e70 n55 is it normal to smoke a bit of blueish when reving the car . i didnt have that smoke with the stock downpipe 😢 what could be ?

[@DidkdjcAskslim]

your cylinder heads might be fucked or your car could just be burning a ton of oil

[@niaedwards382]

This is a RWD, Right? Would I expect the front axles to be in the way if I have xdrive?

[@FritzRamos]

I wouldn't think so, mine was well out of the way.

[@niaedwards382]

@@FritzRamos ok thanks. You video will help me a lot when I do my downpipe as soon as it warms up.

[@FritzRamos]

@@niaedwards382 awesome. Let me know how it goes

[@edgarg.7299]

Where did you buy those v band clamps?

[@FritzRamos]

Dealership

[@noobonrocketbakkeb2337]

Do you know if it will fit a 220i?

[@FritzRamos]

I believe so. You can check real OEM and VRSF's website to make sure.

[@Minipica1]

Where did you get the v clamps?

[@FritzRamos]

Local dealership

[@tomasprieto9746]

Which are the correct v band clamps?

[@FritzRamos]

I just went to the dealership

[@MrVuittonDon]

So you didn't simply just buy the pipe, you bought a extra vband clamp and gasket? I have a B46 230i. Also the pipes look completely different. Not sure why is that now. Also, which app are you using to remove the check engine code. Is it specifically for the downpipe/exhaust or is it in general from the whole car.

[@BimmertechG01]

This installation video is for the N55 L6 motor. The B46 is a completely different L4 motor and exhaust setup so you would need to find a catless downpipe specifically designed for it, the N55 downpipe won't be compatible. To run catless downpipes you need to get a tune of some form, whether it be a flash tune like MHD/BM3, a piggyback like JB4, or a custom tune is up to you. If you remove or modify the cats on the stock DME map it will be stuck running rich with an SES/CEL.

[@MrVuittonDon]

@@BimmertechG01 great thank you.. any idea on reliability for a BM3 Stage 2 tune? I will be running VRSF Catless downpipe Custom Axel Back Exhaust, BMF Billet Intake, and Aluminum Charge Pipe. 2nd Q; Would you think installing the intake before the tune would bring any issues? Seems to be a easy pull and play DIY. Much appreciated.

[@BimmertechG01]

@@MrVuittonDon I personally can't speak on BM3, as I went with MHD for the N55, currently running VRSF catless downpipe with Turner motorsport aluminum charge pipe on MHD Stage 2. So far I'm absolutely loving it, I don't have any dyno numbers to accurately report the power gain, but I feel comfortable saying at least +35-40hp from just the tune and catless DP. I am on AWD so the torque might feel different on R/FWD, but I can say with confidence the torque gain is extremely noticeable, including torque steer. The one thing I will say is I've seen many people mention that your spark plugs and coil packs will go bad sooner when running more power, which does sound realistic. You will definitely smell gas on cold start and after pulls/spirited driving with catless DP. However if you are running in comfort mode and not driving too hard with the windows up (think regular stop and go commutes) it is virtually unnoticeable, completely unnoticeable with recirc A/C on. Make sure to install the aluminum charge pipe before anything else as you don't want any present or future boost leaks or full on limp mode from OEM charge pipe failure. I am a mini technician and I will say the B46 charge pipe should be a lot easier to do compared to the N55, but I would recommend making sure your clamps/clips are 100% air tight before install. Renew the rubber O rings on the connection to both the intercooler and throttle body with the new charge pipe, and if possible use heavy silicone spray to partially lube the rubber so it doesn't fold over itself during installation, just as a preventative measure (I wouldn't recommend WD-40 or any other spray/grease based lubricant as you don't want the residue going into the motor). Regarding the intake - I highly doubt the intake upgrade would cause any issues without a tune, it will definitely be easy to install, however I have seen some on BMW forums mentioning they got SES lights for "mass air flow too high" when running the intake with no tune. I would say install the intake, run around with it for a bit and worst case scenario if you get a "MAF too high" code you just put the stock box back on until you have the tune and other upgrades. Long story short version: If BM3 is similar enough to MHD I can highly recommend it with the bolt ons you mentioned. Give the intake upgrade a shot regardless of tune but put the stock box back on until tuned if you end up getting an SES light, even if you don't do any other upgrades or a tune to the motor 100% do the aluminum charge pipe for reliability and peace of mind.

[@MrVuittonDon]

@@BimmertechG01 my catless downpipe is on backorder. So I have to wait until Dec 20th unfortunately. I have everything else though. The b46 doesn't have any dedicated Intercooler, only these small radiators that most people were saying are NOT worth the $600 "upgrade". Contemplating doing a custom fit for a Intercooler, but not sure if it's even worth for this 4 cylinder engine hmmm. It will be more of a daily driver, cruiser anyway. I have a Nissan Skyline R34 Sedan that will be in and out shops for a while, that's why I got this little vehicle recently. Small, quick, New tech/engineering, all just a peace of mind. I was so surprised from the B46 response in sports while playing with paddle shifters. Extremely underappreciated mode. 🙈😇👍🏼

[@boostlee876]

How do I go about finding the lower v band. And what size it it? The upper is 4” but that is the lower?

[@FritzRamos]

I just got it from the dealership

[@boostlee876]

@@FritzRamos gotcha. Thanks

[@Woof1022]

do you know if the process is different for X-drive cars?

[@FritzRamos]

Should be about the same. The X drive might have less space.

[@Woof1022]

@@FritzRamos ok, thanks!

[@dkrawk8309]

How many baby Polar bears have died since this install?

[@KIRILLG88]

Hey, is it the same way instalation for xdrive model?

[@Storm2you]

yes

[@FritzRamos]

Thanks for sharing

[@grantkondourajian6150]

@@Storm2you No! It is not. The X-drive model has an additional support plate (center jack point) that is 8 bolts to remove, then you can access the downpipe. However, the engine mounts are different and do not have a hole in the middle like shown in the video so the only way to get the top v-band clamp off is using a ball joint and multiple socket extensions. Overall, took me about 5 hours to complete.

[@muhammedq9109]

How long can i run catless before i get a tune ?

[@FritzRamos]

Technically you don't need to, just code out the CEL

[@haruny]

will it pass the SMOG like this?

[@FritzRamos]

I'll let you know in about a year lol

[@samsam_f87]

no it won’t lol i know this from experience

[@ChooseLanes]

no it wont

[@MrGotRice24]

What size clamps are used?

[@DidkdjcAskslim]

it depends on your car of you have a model 2013 and under your size will be 3.5 anything over is 4

[@benjaminstark8435]

DISCLAIMER: this is only on the non Xdrive version

[@NEfishingtales]

I got x drive. Same thing

[@ONI37]

Doesn't matter

[@VictorRamirez-rg4pg]

How do you go about passing smog now ?

[@FritzRamos]

I'll let you know in about year lol

[@alexandercartagena3416]

It's been a year, any news?

[@thunderthumbz3293]

The catless sounds worse to me + plus the rattle sound.

[@samuelbermudez2971]

Does your car smell like a Honda?

[@FritzRamos]

Which would be what exactly?

[@samuelbermudez2971]

@@FritzRamos carbon monoxide . Since u have no cats

[@FritzRamos]

@@samuelbermudez2971 then tighten the clamp or change the gasket

[@samuelbermudez2971]

I dont understand. Doing this mod. Will my car stink now

[@mecheng1977]

Thank you for polluting the environment for 0.2 seconds improvement in acceleration, and thanks for making an illegal modification to your car.

[@camai75]

Thanks for being a self righteous douche bag!