We Answered EVERY S55 Crank Hub Question You Have! Diagnosis, Explanation, & MORE!

[@ronintheamazon1492]

I’m at 590whp in my f82 fbo full e85 and i have the insane performance crank hub. Cars runs perfectly. When I had my oem hub taken out, my friction disk was split in half. I was a pull or two away from spinning my hub. There are shops that have had cars spin the hub while going 2 mph going on the lift. It is INSANELY random. Spend the $ for the piece of mind because ur car is bulletproof until around 700hp if u just get the hub done

[@dinosoarskill17]

How much did the crank work cost you?

[@6speed05]

It’s always the guys who make and sell the parts that make it sound like this mod is mandatory 😂

[@Paulius923]

Its not, but it gives you peace of mind, especially if youre going up in power

[@Ghost-vp7wz]

it kind of is unless you want you want something to go bad lol

[@IKenexPSN]

Had my m2c a year stock. Put a tune on and it spun the hub on my way home 10 minutes later from getting the tune. I’d say its almost vital if your tuning…

[@chosyn187]

@@IKenexPSN you either drove like shit or it was going to spin anyway

[@IKenexPSN]

@@chosyn187 how do you ‘drive like shit’ in an auto? 😂😂😂 theres either power there or there isnt. its easy to pin in on everything else other than a terribly designed part yet again from bmw. Soon as these cars are mapped its a matter of when. Not if!

[@sherwinrayan]

Nice informative video guys... thanks. I have a stock F80 within warranty, and last month raised this crank hub matter with BMW Oz. They didn’t know anything straight up, but did chase it up for me internally. Here’s what they said... paraphrased. The design is a mechanical fuse. Due to the lengthy crank, and the chain drive being located on the end opposite to the transmission, there is a tendency for the crank to oscillate/vibrate as it twists. They want to shield the chain drive (and VANOS) from this vibration by allowing the crank hub to spin. However as the engine is of the interference kind, they have a sensor which detects the spin, and then limps it, throwing an error code almost immediately. They also stated that horsepower is a factor here, since whilst the chain drive mechanism is not load bearing in its operation, a higher tune could cause even greater crank oscillation. I can’t speak to whether DCT operation has any relevance, as that was not part of the conversation I had with them. The thing that they kept coming back to was the location of the chain drive, and how this is critical to why the crank hub must be allowed to spin in the S55. They pointed to how in the S58 engine, the chain drive was relocated to the transmission side, and hence they made the crank hub a single solid piece which cannot spin. I think that as they were speaking to me, they were up selling the G series! Anyhow, hope I’ve added something useful to this topic.

[@richkoh7305]

Mate! I'm in Oz and interested on your outcome. I run a 2018 competition which is just short of 450 hp and allows me to loose traction in 3rd gear. I'm surprised that BMW refer to any increase in tune will have an impact ? while they have already tuned the standard m3 to competition to cs without changing the crank hub ? or have they ? Keep in touch - I don't track my car but I enjoy the drive ;)

[@sherwinrayan]

@@richkoh7305 Hey bud, mine is also a 2018 Comp... glad ur enjoying your car! These are brilliant machines stock, and perhaps more so when tuned right. I'd expect that BMW, like any big corporate, is just being conservative with what they tell customers. Yep; true that they've upped the power through to CS spec without taking any steps to spline lock the crank hub. My best guess would be that after the very early spun hubs (

[@paragontau7995]

Thanks a ton for this information. Sometimes, the best information available is avaliable in KZbin comments lol.

[@sherwinrayan]

Paragon Tau Most welcome bud.

[@CaptainCarling]

Makes good sense that does, BMW engineers ain't stupid

[@Matt-xq6ow]

They drill 4 holes into the crank shaft? Man, I'd be SUPER at unease with that...

[@IKenexPSN]

EVERYSINGLE company does this and not 1 worldwide has failed…

[@JiuJitsuM4]

@@IKenexPSN agreed. Zero issue. Unless you get the Vargas solution which I had on one of my M4’s but removal requires a special tool and it’s not nearly as respected as a pinned crank hub.

[@chooks620]

Im a bmw tech. And this crank hub issue is not a real issue. It’s something forums and word of mouth made it seem like something it’s not. Spinning the crank hub only happens in manuals cars when over revving when shifting into 5th gear. Bmw dealers are oblivious to this issue people claim to “be common” literally only saw one m3 come to the dealer for this happening. So yes it can happen on these cars but on manuals due to driver error but it’s not some weak point on the car like people say it is

[@SimplyCarThings]

that is not true lol, i personally know at least 4 people that spun their hubs, all with DCT gearboxes and all tuned running E85. I was in the car with one of my best friends when he spun his crank hub and I got in on video. Its on my channel let me know if you want the link

[@domke7422]

This problem is definitely overblown, but for good reason, it’s an engine killer potentially. Funny thing is that the load placed on the crankhub is from powering the valve train and oil pump. This load does not change in a meaningful way due to increased horsepower. The load increases if you raise the RPM limit, or somehow increase the resistance from the valve train. But this issue seems to be more prevalent with tuned cars. My only explanation for this is driving behaviors from people with tuned cars. And this BMW tech clearly does not know what he is talking about..,

[@chooks620]

@@SimplyCarThings like the next commenter said it’s an issue one that is blown out of proportion. And you’re saying “not true” im not gonna argue this issue with you when I’ve seen, read, and been explained the cause of this issue from our engineer liaison

[@sandro2304]

Is there a shop you guys recommend in the Bay area for tuning and for replacing the crank hub? Also, does the B58 and S58 engines have this problem?

[@sebastiand.1305]

Sandro Herrera I am also located in the bay, and have yet to find a good shop for my M4.

[@shah.siddiki]

Road trip down to SSR never hurt no one 😉 we get MANY customers driving down from the bay on a weekly basis 🤙🏽 would love to take care of you guys

[@danilorodriguez4665]

B58 and S58 does have integrated crank hub, so no problem

[@sandro2304]

@@danilorodriguez4665 Thanks!

[@sebastiand.1305]

shahbrah after coronavirus calms down you’ll definitely see me down there.

[@IKenexPSN]

Had my M2C stock for a year. Put a tune on and i spun the crank hub 10 minutes after the tune on my way home 🤦 i did 2 pulls and it spun! Cars currently in tbe garage right now getting the insane performance 4 pin crank hub! Vital if you ask me…

[@deanbadul1152]

If I get a crank hub fitted to f82 m4, would you say I’d be safe to kick down?

[@MADLITS1K]

Bmw makes such nice cars but they never seem to make them reliable enough.. there’s always the handful that never experience major problems but the majority of owners always deal non sense issues that cost a ton of money to fix. I don’t ever see myself buying a bmw unless I have money to just throw away, solid video very informative

[@user-sn5kj1gy1t]

Nah bmws are really good, it’s just that the people who had problems had big following meaning they have a voice over everyone else 🤷‍♂️

[@drefinesse2]

Where is the link to purchase this?

[@fantomg100]

the most important question how much is it to replace it before it breaks?

[@jacobmaruky3139]

Like 4k lol

[@Genesislights]

In the most ideal way, the two sprockets should be built in the hub then keyed/spline to the crank, but this is engineering and a good engineering is both robust AND cost effective. The Bimmer Engineers probably do this for the manufacturing cost and I’m pretty sure they did the math based on potential failure modes, but perhaps they should reevaluate the potential failure modes and come up with solution. Static friction to transfer torque is actually pretty robust if it is spec correctly. Your manual clutch relies on this principle, granted when the clutch fail, the engine doesn’t blow out. I think the issue was the bolt was backing out and losing the compressive tension needed to maintain that friction.

[@Leandre22_02]

What if you just straight pipe and no tune will it spin?

[@drivenbyricky4651]

I just learned a lot. Thanks Omar!!! SSR is the best!!

[@SimplyCarThings]

Life of Ricky thanks for watching man! 🤙🏼

[@montana2806]

Is the problem fixed on the 2018 and above models?

[@amcheung10]

Yooo thanks for getting my question in there! Great content as always, very informational and helped me a lot since I'm new to the S55 platform.

[@SimplyCarThings]

Of course bro! Thanks for inputting your question!

[@markramos1254]

I love taking my 335I to SSR Performance, Nice and fair guys out there too.

[@stoss-11]

Mark Ramos very much agreed!! Mark is the man😈

[@SimplyCarThings]

indeed they’re a great group of guys! 🤙🏼

[@karlkarl5733]

I wonder if stage 2 N55 M2 requires that too as preventive maintenance. Manual trans

[@jendersonpen7175]

I’m on the edge about this, bmw says it’s not common. And people say it’s a must, I have a 15 f80 dct tuned with bm3 stage 2 and I drive the hell out of it. Always spirited driving. I just don’t use kickdown because I like to shift on my own. My car is still under warranty and the dealership I bought my car from are cool enough to fix any problems with my car even though I’m tuned and have after market parts. I told them about the crank hub and if we should get it replaced with an aftermarket one. And they told me that if I buy it they will install it for free, but if it fails then that’s on me. That’s the situation I’m in LOL.

[@curtishoward5584]

I’ve got s55 m3 that has this issue right now. In Kentucky. Can’t seem to find anyone willing , with tools that has the know how to repair it. Know anyone around this area who does?

[@jaman2366]

Where can you buy a 2 piece crank hub? And how much would install cost pre engine blow up?

[@dannyli5946]

m4 have to exchage this crank hub if i mod it to stage 2????

[@davis7323]

that's what theyre saying , 500whp

[@1v1qsns]

Can someone explain to me why it can’t just be one piece with a bolt? Why does it have to be two separate sprockets??

[@ActionHank]

Picking up my First 2011 335i next week! Love the vids and you've given me a lot of useful info. Can't wait to start getting some bolt-on's and bump the power-up! Keep up the good work man!!

[@hydra_4454]

what if i maintainining stock condition of my m2c? will it effect the crank hub? no mod at all

[@jliao3100]

Here is another question, under a SCH situation, what is the opportunity to blow up the whole engine? Seems most of the case just need to replace with an enforced CH and do a re timing? If that’s the case, people could still do the CH at that moment, without replacing the whole engine. Feels it’s fair to not worry too much

[@SimplyCarThings]

Yes, from what i've seen the DME is pretty good at catching when timing is off and will shut the engine off to prevent further engine damage. Most of the time a retime is required but there are many cases where engine damage did occur

[@RaGeAlucard]

engine damage is very unlikely.

[@OmarAli-cy7vt]

What horsepower would you suggest, i have a f80 M3 2018 with 10k miles thinking about going Jb4 Stage 1 if anything maybe Stage 2, but scared if it will throw the hub only thinking about pushing 460-470 wheel on the car. What you would you suggest @Omar , and great video man answered here.

[@dilf8213]

Idk if this is a dumb question but I’m buying a fbo Jb4 m4 putting down 615whp and I’m scared of the crank hub issue occurring how do I know if it is happening? Or how can I diagnose it before my engine blows ?

[@prettyboyswag28g]

If that car is pushing 615 WHP I’m suprised the crankhub hasn’t already spun. That’s too much for a stock crankhub. It should cost a little under 2,000 to bulletproof the crankhub, that’s with installation and the actual crankhub. If the crankhub spins you’ll immediately know because you can’t drive the car anymore.

[@dilf8213]

@@prettyboyswag28g update on Bm3 custom tune stock hub 40k miles north issue

[@wjlowe111]

Do you need it for the 2020 M4 ; I dont see an option to buy it for that year

[@yg78t76t7]

Yes.

[@commantrosexetlos4700]

Do the 2017 and after models affected too? Because most of them are pre 2016..and is it possible when you remap it but dont remap the gearbox to be better than tp remap and the gearbox and push it to even more fast changes..to cause the issue? I mean maybe its not the raise in power but the gearbox remap is what is causing the issue?

[@davis7323]

People state the crank hub part never changed through the s55 motors, people are also theoretically stating that, BMW knowing this maybe "extra" upped the torque and extra tightened the bolt , tall tales of BMW forums.

[@Guffy95]

Hello guys. Could you tell me please what type of drill did you use? Best regards :)

[@toddsimone7182]

Being the owner of a new 2021 6spd M2 Comp I think I'm safe to run her how I please without worrying during the first 4 years of my warranty period. If it doesn't fail by then i should be alright in the long run.

[@kenny0271552505]

The pinned hub is good but wouldn't drilling the crank case for the little pins make it weaker? Also the pinned hub by itself isn't 100% solution. The bolt can still back out cause the hub to spin. Would need the bolt capture and the hub for it to be a so called 100% solution. This has happened to a guy with MaxPsi hub with the double pins.

[@user-sn5kj1gy1t]

Pretty sure it was the shops fault then who ever installed the bolt did something wrong

[@chris5401000]

That 100% guarantee is a bold statement!!!

[@sandro2304]

BTW Omar, do the B58 and S58 engines have this problem?

[@BosaFTW]

No as it‘s one solid piece now

[@drew6391]

for this installation what is the expected price to pay at srr?

[@hellohunter8583]

I’m probably going precision dynamics

[@mikes8218]

What are the race track cars doing about this issue

[@pkprinceq5677]

does this issue effect 2018-2019 m4?

[@cokemachine62590]

Yes

[@mikes8218]

Did N55 have this issue?

[@edward-tv]

Great drive last weekend man! Got the max psi 4 pin crank hub installed a couple days ago. Love it and I finally have a peace of mind

[@BrokenStatues7]

Niceeee. This is the only thing holding me from buying an M4. Sounds like they are bulletproof besides the crank hub. Good to know there’s a 100% successful fix! How much does it cost out the door? 3,000?

[@sebastiand.1305]

BrokenStatues7 Buy the M4. The likely hood of a spun crank hub is very low. I am running 560hp in mine with no issues so far.

[@BrokenStatues7]

Sebastian D. Planning on test driving M4 and RC F once things start opening back up. I’ll be picking the one I enjoy the most. Thanks for your feedback.

[@sebastiand.1305]

BrokenStatues7 I can’t speak on the RC F, but the M4 is probably the best car under $100k. It is similar to a 911, I actually like it more. .

[@SimplyCarThings]

Give them a call and they’ll discuss pricing with you since it can vary a bit! But yea, S55’s are solid engines aside from this one problem haha

[@nickdominic9103]

I’ve been working at a dealer since before these cars came out have never seen a single soul do one. This obviously only affects the boy racer types with excess of 600 horse

[@levargwilson]

Does this apply to a 2015 BMW M4? Thank you.

[@SimplyCarThings]

No problem, yes it does. My M4 is a 2015 model year

[@levargwilson]

Simply Car Things that is fantastic.

[@levargwilson]

Simply Car Things should I be concerned with this on a manual transmission? Do you have any reputable shops in Texas you can recommend? Thank you.

[@levargwilson]

Simply Car Things I am coming over from the EVO community and the 4G63 engine. To me, learning the strengths and weaknesses of this new platform is very important.

[@SimplyCarThings]

@@levargwilson Of course i understand man! And its been a known failure point regardless of transmission type, although DCT cars do seem to have a higher failure rate.

[@adcampo7601]

I just spun my crank hub. It’s slightly out of time. I’m selling the car and may just have the dealer to an OEM fix rather than the full upgrade.

[@yg78t76t7]

that's kinda stupid...your car would have way more value if you upgraded the crank hub

[@inlinesix6694]

great video! getting mine upgraded next week.

[@SimplyCarThings]

eddie alvarez Hell yes brotha! If you’re getting it done at SSR, let me know cause I can get you a discount 😉

[@inlinesix6694]

@@SimplyCarThings Getting it from Studio RSR they just happen to be right down the street from me. I think you know thsoe guys too 👍

[@paulpateman3968]

Omar brilliant video really informative and interesting really enjoyed it are you doing yours stay safe Bro

[@SimplyCarThings]

thanks man, hope the same with you too!

[@davidkeizer9381]

The new M2 competition has the same engine and incorrect?

[@SimplyCarThings]

david keizer Yes it has the same engine

[@1stock_ttrs]

Been looking for a video like this.... thank you!

[@SimplyCarThings]

No problem man! Glad you liked it

[@aymankanana4869]

Does the N55 have the same issue?

[@sickvendetta9]

Ayman Kanana No it does not.

[@aymankanana4869]

Thank you Marlon. Is it because the N55 doesn’t have this crank hub design or because the power can’t get high enough for the crank hub to spin?

[@garett2892]

Looking at a 2015 m4 with 12k miles for 42k should I run away? It’s my first sports car

[@davis7323]

thats very low miles, one owner? private seller? tuned? a lot of variables, I wouldn't run away unless obvious red flags..

[@mcp08gt]

So nobody asked how much this cost? For install etc??

[@chgsupra1]

Your video with SSR Performance answered my question about the crank hub. Very informative and detailed. 2018 M3 Stock, DCT, no plans to upgrade yet. Thanks!

[@JohnnyLehti]

I stick out my head and say that it has NOTHING with horsepower to do. How would horsepower make it harder for the cam drive system and oil pump to rotate? Horsepower doesn't go throught the crank into the bolt itself and everything in the cam drive and oil pump system is exactly the same so nothing creates more resistance. I say it has only with transmission chocks to do. Extremely fast rev changes. I also say that it is much worse for the hub to stand on the dragstrip with slicks and dump the clutch then driving on the street with stock clutch and 700 horsepower. Another intresting thing is that BMW motorsport never have had any issue with the hub on their GT4 cars.

[@Haleskinn]

if i install it and it fails will you change my engine for free and pay for the engine?

[@SimplyCarThings]

The part is warrantied for 1 year or 10k miles, so I believe yes you would be covered. But that wouldn’t happen to begin with 👍🏼

[@ikebuttle360]

Don't know about US prices but in the UK you can get a s55 for like 5k so spending 3k on a ful fox is seeming more and more pointless

[@iczumbul1152]

Hi Guys big respect to all involved SSR please can you give us explanation of how to put crank and cams in phase hod do you know where to drill the crank

[@cagaming6789]

Thanks for the info guys!

[@SimplyCarThings]

anytime! 🤙🏼

[@seandoc97]

Great video! Thank you for the info!!!!

[@MrSouthernInfo]

Thanks for doing this video. I had no idea the improve the initial design from maximum psi.

[@SimplyCarThings]

Anytime bro! Yes, it’s a slight revision to the original design!

[@gavinsloma]

This is such a solution in search of a problem....

[@DuperSuperDave]

Really, the No. 1 question NOT answered was, "How much is the turn-key job by SSR to replace the crank hub?" Parts & Labor of course!

[@SimplyCarThings]

if you're curious about pricing, just shoot them a message on instagram or call them real quick

[@richieprice7308]

What’s it cost?

[@Romu1us]

It’s as if bmw makes sure every m3 generation have a major engine problem lol. F80 - crank hub, E9X - rod bearings, e46 - vanos. Smdh. Still love the car tho. Had an e90 m3 and looking into an f80 #yolo

[@MrDavidchuck]

Every car has its own issues. It’s all a business 🤷🏽‍♂️ We’re far long over due with having perfect cars on the road. But what fun would that be of the people manufacturing and running these companies? Gotta have multiple outlets of incomes if you’re into making money.

[@stephenlozano2816]

Shouldn’t BMW be paying for this to be corrected?

[@cokemachine62590]

Watch 12:04

[@jeffreyodonnell2928]

Thank you Omar! Answered all my questions.

[@SimplyCarThings]

Anytime man! Thanks for tuning into the video!

[@jmsterdam]

Why not one piece that has two sprockets? Why still two parts?

[@SimplyCarThings]

J-Msterdam basically for ease of installation, the two piece design doesn’t require the oil pan to be dropped which can be quite extensive if the shop performing the install is inexperienced

[@jmsterdam]

Simply Car Things thanks, i figured there must have been some good reason for it

[@SimplyCarThings]

J-Msterdam no problem, i did a full install video on this crank hub too from start to finish. I would recommend checking that out as well you’ll get a really good idea of what the install is like

[@MrDavidchuck]

This is ONLY if you’re tryna mod your BMW for more power. He’s not saying, at all, this is mandatory and you need this for your car.

[@SimplyCarThings]

Exactly!

[@Orlandobori]

Great video really nice info too!!

[@SimplyCarThings]

Thank you, im glad you enjoyed it!!

[@seattle0099]

You may only need this when you go for stage 2 or 3, otherwise, it's just a waste. Higher powered M4 GTS has no issue with the same crank hub

[@davis7323]

what's considered stage 2 to you? downpipe and tune?

[@autotube4000]

Hey I bought an M4 that was turned previously before purchase how would I know if the crank up was fixed or not ??

[@mranderson6296]

Did you find an answer bro? I'm in the same boat, no history on car but it's been tuned and modded, be nice to know if the upgrade has been done?

[@KiesMotorsports]

Great video 🤙🏼

[@SimplyCarThings]

Kies Motorsports Thank you so much!

[@hawad4251]

Here is a question. Do you have issues with power loss, less rev happy S55 and crank shaft long term issues? Do to heavier keyed hub and the fact that there is a very small play?tolerance in the keyed hub.

[@stoss-11]

Wow dude very cool to see you in a SSR shirt. I really hope you get an opportunity to work there or somethin that would be sick. I’d see you and the m4 more often! Marks my guy there😈 sick ass video bro so hyped I hope you become apart of there team!

[@SimplyCarThings]

gavin stosser Mark is super chill! and thank you haha, really appreciate that!!

[@andrewthomson9854]

What was the cost?

[@davis7323]

I was told by my shop the part is like 1200-1500 and the labor is about 1800-2000

[@chrizcars3126]

Keep these videos coming bro 🔥🔥🔥🔥

[@mohammedakbar3447]

This is such an overhyped problem. Interesting that the issue is raised by the garages who offer a fix !! If you are massively tuning an m4 maybe but the issue is theoretical.

[@rhdjonn]

Great content

[@SimplyCarThings]

Thank you my friend!

[@jpbredenkamp5091]

Why not just make both sprockets one piece? Why does it need to be (2) pieces in both BMWs original design AND the updated remedy

[@SimplyCarThings]

JP Bredenkamp For ease of installation the hub is designed in two pieces. This way the oil pan removal isn’t required during the install procedure

[@SpectroRacingChannel]

thanks for this one too

[@SimplyCarThings]

You're welcome man!

[@accord21]

The most important question of all that was not asked, how much?

[@SimplyCarThings]

It’s tough to put an exact number on pricing, most cases are different and depend on multiple factors. if you call SSR they’ll give you a quote and answer any other questions you have

[@JerainJezza]

@@SimplyCarThings It's just on their website, 1200 dollars. :D

[@davis7323]

@@JerainJezza for the part alone.

[@jeancharlesrabaux5658]

Il y a pas que se pignons a changer pour que sa marche bien et longtemps il faux changer les coussinets de bielles en metant des coussinets plus robustes moi j ai un amis qui as ausser en monter des fait en forger depuis et malgré sont gros turbo plus jamais embêter par c est coussinets de bielles

[@walloz90]

Haha Si after all the talk about, not wanting more power than the n55 single turbo could do. And all the crap that you like better the n55 single turbo setup, you end up with a twin turbo setup after all and one more unreliable then the n54 where there is a design flaw that you have to drill into the crank shaft. Nice!!!

[@kriso71]

So...if I get this my engine will be bulletproof? 🤔

[@nickdominic9103]

Lol Bmw doesn’t make anything bulletproof get that out of your head.

[@stoss-11]

You should do a carbon trunk and hood like in that blue m3 that’s shown in the beginning of the video it’s so aggressive I love it😈

[@zamx96]

Great content man ! This was very informative. Also UAE represent ✌️✌️

[@SimplyCarThings]

My guy 🙏🏼 thank you for watching!

[@MrJordipar]

Very informative video bro. ..👍🏼Thank you so much for your your work....🙏🏼

[@SimplyCarThings]

jorge parada Thank you for watching and supporting the channel!

[@dessancoleman1355]

Damn, I was gonna get 6MT f80 M3 and now I gotta a worried about this shit lol when I get and I have to drive it carefully now damn BMW THANKS LOL,

[@prettyboyswag28g]

It rarely happens in a manual transmission. It usually happens to DCTs and even then it’s still rare. Dw about it, you should be good.

[@ThePan831]

Gotta be a photographer now to own an m4 and go to ssr for a new crank hub lol

[@doca8792]

Vargas CH makes the most sense, if you’re even going to change this.

[@TimChump]

I just don’t understand why bmw would design them like this 🤯 surely they could easily made a one /two piece solution

[@kerenwang437]

Thanks for sharing the idea. My plan is to keep stock power configurations till warranty due. Then, I will get the crankhub replaced before I start tuning. However my worry is 1. finding a shop which is able to do the job properly in my country; 2. getting the part shipped to my location. I wonder if SSR Performance ship parts to China. If they do, problem no.2 solved. (＾▽＾)

[@YUNGLACE_]

SSR🤩🙌🏾

[@SimplyCarThings]

👑💪🏼

[@carnut5562]

So has BMW fixed the issue on newer cars?

[@yg78t76t7]

Yes

[@turboterry1776]

really hope local shop has experience doing CH lol

[@RobertCorace]

Show us the Metal testing data. if you want to tune your car than take the risk, this motor was NOT designed to be pushed harder than mild tune.

[@khemchee4685]

Bro you missed the #1 QUESTION!!!! You should of had him give a estimated quoted price for the part and installation. Probably value information people might want to know.

[@jerolvilladolid]

2010-2020 BMWs were designed by engineers without passion. They were just given wads of cash and told to draw up a blueprint. The crank hub was an overlooked detail. Thats all it is, there is no reason or logic for them to make that, other than it was overlooked in design. E39 and E46 and older BMWs were designed by engineers who loved cars. These new BMWs, everybody working on it just want it to be over with and for them to come home with their fat paychecks.

[@SimplyCarThings]

I wholeheartedly disagree but everyone has the right to their own opinions 👌🏼

[@thineshchandra1066]

Y did BMW designed it in such a way?

[@nicholasborrelli7544]

Right? Right?!? Right! Right?? Right!?

[@shiftlight314]

Let’s ask the real question... why would they not do this from the factory? It makes no sense BMW engineers would design in this manner.