How To MODIFY a BMW M340i B58 in 15 Minutes!

[@zRepLaY]

Great video btw. Solid information. Taught me tons of stuff coming a mustangs since High school

[@GearsAndGains1]

Thank you!! Im glad I was able to help you! Any other questions feel free to comment or watch some of my other videos!

[@Chubz79]

Catless Downpipe vs good high flow catted downpipe is negligible power wise. It’s been dyno proven

[@Yhyujss]

@@Chubz79 and with a 200 cel high flow cat you will be able to pass a M.O.T

[@cosmomorris9688]

@@YhyujssI’ve raced the same build as mine just dif dp and it’s the same mhd stage 2 high flow vs bmd stage 2 catless

[@Yhyujss]

@@cosmomorris9688 yeah bro there's not much in it the only differences is d-cat is cheaper and absolutely stinks of exhaust fumes and you won't pass an mot.

[@GearsAndGains1]

Yes but in the long run catless downpipes also sound better and for higher horsepower will be needed. Very rarely do you see big turbo or highly modified cars with catted downpipes

[@Yhyujss]

@@GearsAndGains1 I don't know about that but I have m140i and stage 2+ with a performance panel filter, 200 cell catted down pipe, and a tu Supra hpfp making around 475hp 712nm don't get no e mixes here just gas pump 99 I'm not looking to go any further than that I think that's enough power for a small hatchback.

[@ashtonhensley4256]

rk tunes has the fastest bmw to hit the strip right now. the twin turbo s58 ran like a 7.94 or smth

[@Thatn55]

Trans tune is also great highly recommended

[@GearsAndGains1]

Trans tune is the best 🔥 shifts super fast

[@Xoomey]

Very informational and crisp video but brother wth is that spoiler it looks like a ikea hanger

[@GearsAndGains1]

IKEA hanger 😂 thanks for the comment man! I like my spoiler a lot of people hate it but it’s different than most spoilers everyone else has! It’s from Vorsteiner

[@gunnarpolk-in1cw]

can you do a fitment tutorial pls🙏 this video was very helpful thank bro

[@GearsAndGains1]

Hell yeah I can! I’ll try and do it this week or next week! Either a short or a full on video but I’ll have it done! Fitment was hard to find out on this car, I kinda just bought wheels & tires & prayed 😂 but it worked!

[@akimbocs]

put some center caps on the teehees brother!

[@GearsAndGains1]

I have to get an adapter! These Teehees dont take center caps unfortunately but i definitely want an adapter to put BMW floating caps in there!

[@Wh0_Me_B58]

Charge pipes whether gen 1 or 2 are a cosmetic thing. Stock gen 1 charge pipes have been rated for over 600hp without issues.

[@GearsAndGains1]

On Gen 2 I think charge pipes aren’t necessary but i definitely think on Gen 1 you should get one if you’re pushing higher HP. I’ve seen a lot of people crack them due to age & higher boost levels.

[@Wh0_Me_B58]

@@GearsAndGains1 kzbin.info/www/bejne/gKGZoKCirdh2jMUsi=eqLOsIdwaG1nAUjC

[@Trav2183]

Bro you need to do a reflector delete and replace with white ones. Your car will look much better. I have a black m340i I’m thinking about just tinting the reflectors.

[@GearsAndGains1]

I definitely wanna get those! I just haven’t gotten around to it. I did some on my mk5 Supra & they looked so good when I had it! Getting rid of those orange carrot looking things will make it looks way better 🔥

[@ee00mmmmm]

Is a charge pipe and intercooler necessary for a stage 2? I currently have a dinan intake and vrsf catted downpipe with an exhaust coming soon. Also if my car 2021, is getting my ECU unlocked a MUST? it seems like a lot and I just need a small tune I don’t want anything that would push the boundaries and cause reliability problems.

[@GearsAndGains1]

@@ee00mmmmm charge pipe & intercooler isn’t necessary! Those are more for higher HP reliability. Intercooler is more for cooling & charge pipe is for long term reliability but on the gen 2 it rarely breaks. Unfortunately because BMW put crazy protection on their cars you will likely have to send your ECU out to get unlocked. Check your ECU build date, it should be written on the ECU itself. If it’s June or July & after you’ll have to send it out! If not you can probably do a regular bench unlock. JB4 piggy back tune is another great option to consider if you don’t wanna have to send it out!

[@frankyowo9268]

awesome video do you have a link to your rear diffuser

[@GearsAndGains1]

I linked everything in the description of one of my videos on “top 5 mods for m340.” Check it out bro & thanks for watching!

[@zRepLaY]

I’m eye balling ‘22 m sport 540i.. even I want stage 1, catted dp and an axle back, would I still need to send my stuff to femto??

[@GearsAndGains1]

I think so yes! Every BMW 2021 and after will have to be sent to femto for an unlock. A JB4 is not a bad option if you want to avoid having to send your ECU out! Its just like a plug in tune.

[@hunterwaddington7767]

Go with a hybrid turbo and run the s58 injectors. You will have 30% more fuel.

[@GearsAndGains1]

S58 injectors? Wow I learned something new today. Hybrid turbo I know goes crazyyy those things are so good 🔥

[@broadwayjay3748]

saying b58’s have a front mount intercooler is wild

[@GearsAndGains1]

Sorry I meant radiator/heat exchanger 😂 I was helping my brother build his BRZ this week so got it confused since he got a new intercooler. Intercooler is built into our intake manifolds!

[@xoxmintyfreshxox]

Would a catted VSRF downpipe pass emissions with bmd3 stage 2 tune? Trying to see if I need to put in stock DP before

[@GearsAndGains1]

Yes catted typically always passes emissions in any state! I think cali might be the only one you can have a hard time with. Here in new york i believe it does pass emissions

[@xoxmintyfreshxox]

@ thank you! Did you flash back to stock before inspection?

[@GearsAndGains1]

@ if you have a carted dp, you might not get a CEL, so if that works for you then do that! My friend is on MHD with a catless dp & in NY he passed his emissions, where as me with catless & ecutek I can’t pass since it disables the O2 sensors. Try flashing yours stock & if you don’t get a CEL you should be good

[@xoxmintyfreshxox]

@@GearsAndGains1 appreciate all the help. Thank you!

[@at8t556]

Would tune void warranty?

[@purevenom9381]

Yep

[@DomHitEmUp450]

Just go for it bro these mfs hella reliable been on stage 2+ for a year and some

[@GearsAndGains1]

Yes tune will void warranty unfortunately but its fun! These cars are very reliable tuned. Drove mine on 2 road trips so far & it has never given me problems!

[@Thatn55]

Yes

[@hoonigan_sam_2390]

i have seen people running near 700 to the wheels on stock trans or xhp but ur saying that it can slip even at 500 hp? or wats the limit of xhp stage 3 flash? plz lmk i had this question!!

[@GearsAndGains1]

So you can run XHP stage 3 at any level, but I was told by a few people who have tried it that on M performance cars like M340i, it puts a lot of stress on the driveshaft & repeated launches could snap the driveshaft. If you’re racing or launching a lot stage 3 could be dangerous but I do know a lot of people who haven’t had issues with stage 3 because they don’t launch a lot. My friend with a 540i has had Stage 3 XHP for 2 years with no issues. It just depends if you wanna play it safe or go all out! As for the trans itself, it can slip at any horsepower level above 500ish. I don’t know if slipping actually hurts the trans or if it’s popping out of gear and back in to prevent it from hurting the trans, but it’s only ever happened to me 1 time. Yes for sure there are cars running over 700 HP on stock engine internals & stock trans, but there is likely a lot of stress on the trans which in the long run could mean breaking something. STI Mikey just tuned a car that made like around 750 with stock everything axels, driveshaft, engine & trans. What I’d say is the more you modify without upgrading these parts the more risk you have to break. If you wanna go bolt ons & turbo & XHP stage 3 without building anything, I think you can be fine as long as you dont beat on the car over & over again. Give it some time between launches or pulls & all that! It’s been done before for sure, but I just heard from experienced people to play it safe if it’s your daily driver like mine is!

[@hoonigan_sam_2390]

@@GearsAndGains1 but 650 would be just fine right with stage 3 xhp flash?

[@kennethruiz3930]

About how much you think a stage 2 would cost and will it void the warranty?

[@MR-zt7fw]

2021 jun+ car with catless and tune $2600 if you use kies service for Femto unlock this include MHD. (DIY service will probably be cheaper by around $600) Then you can use that to buy trans tune to have both ECU and TCU tune. This is just a rough estimate but I’m guessing it will cost just around 3k in total with stage 2/Tune M340i. I do recommend having flex fuel kit to push a little more power.

[@tyriekmatthews7934]

And tune up well void warranty brother u can tell bmw servers wen u bought the car at the dealership it was already tune some take it some don’t

[@WFFLHOUSE]

You can go crazy with a jb4 like almost 700 and keep all your stock parts; but you need clone ecus. They can tell if you diddy violate your stock dme

[@GearsAndGains1]

It depends how you go about it. Stage 2 can be cheap if you do just downpipe ($300) and MHD off the shelf tune for a few hundred. If you get downpipe, custom MHD tune, and flex fuel kit, it can be about $2000-$2500. Custom tune is always better than off the shelf tune but for people who just want a little more power with not a lot of money an off the shelf tune is fine. MHD has presets in their app that you just click & boom you’re tuned.

[@GearsAndGains1]

And yes tunes will void your engine warranty but most of the time if other parts of the car are defective, a cool dealership will cover it like lights, mirror motors, etc.

[@giovannidiliberto7702]

Awesome vid but pls bro get carbon fiber wing in my opinion that ruins the car

[@GearsAndGains1]

I’ll probably be taking it off soon, so many people hate it 😭 I like it, but My next car won’t have it trust me 😂

[@Thatn55]

Do an n55 version

[@GearsAndGains1]

I can definitely do an N55 version! My friend has an n55 335i. When he gets his car back I’ll see if I can do a video with him 🔥

[@Dabeast7233]

I see you at glen island

[@GearsAndGains1]

Yessir I go there once in a while to film when it’s empty! It’s nice, not too windy, and a great place to film cars 🔥

[@chriskamen2152]

bro lost any validity after the downpipe rhetoric. I drive a Apeks built catted downpipe and I am racing it again lambos and tuned M cars with an upgraded turbo and DS2.5 flex setup. It's a choice its a diff of 5hp maybe with a well made cat pipe. you are right about the air intake though, a cotton filter is all you need until you get to VERY big turbos, turbo inlet is a bigger restriction.

[@GearsAndGains1]

Ive never seen anyone pushing over 700 with a catted downpipe actually. Everyone who races just gets a catless one & maybe does open dump. You'll literally melt your cat with all the flames you car shoots. I've seen it happen before. Thats why people run those exhaust dump turndown pipes, because flames will hit the ground instead of burning the car's undercarriage components.

[@chriskamen2152]

@@GearsAndGains1 these cars control EGT using a combination of fuel and wastegate/turbine speed aswell as timing VERY fast, I am making around 650whp according ot F80paul and Rob(BM3 owner) with a 200 cell, never had any EGT issues in florida. This is also with E50, if you are making that with race gas or 93 with an even bigger turbo it might get hot enough to melt a cat I suppose... but it is not a major flow restriction on a 200 cell.

[@Yhyujss]

Little problem with a decat downpipe in the UK it's called M.O.T

[@smallcarking]

😂😂yes Bro

[@GearsAndGains1]

Yeah in the UK you can't delete anything 😭 Here in the US you cant either but there are so many ways to get around it. The government doesnt check it physically & you can get an inspection at any shop. Only in california will you have problems, but here in New York everyone goes catless!

[@docbattles]

So which will be the best sounding exhaust thing for this engine to be MOT legal in the UK?

[@derekporter66]

please change spoiler

[@GearsAndGains1]

Some people love it & others hate it! Is it really that bad? 😂

[@derekporter66]

@@GearsAndGains1 yessss sir

[@liejuh6486]

Yeah it’s bad

[@rashadarbab2769]

So pretty much if you are going past bolt ons with new trubos and shit just get the S58 to begin with.

[@cosmomorris9688]

Fbo is the farthest I’ll ever go to a car. U go any further u minus well upgrade

[@GearsAndGains1]

Kinda but not really. My car is faster than a stock S58 because the B58 has more torque. Plus the b58 cars are way cheaper. B58 M340i + mods you are still saving a ton of money vs a G80 M3. If you dont care about handling, go for M340i

[@shahedahmed8072]

How can u unlock the ecu in uk??

[@GearsAndGains1]

In the UK you can go to a shop or send it to a shop that tunes for you! The best shop I know is R44 performance in London. They’re so good even a TON of people from the states order from there! They can prob send your ECU to femto to get you an unlock or just do bench unlock too

[@AntWrig]

What’s german rice called?

[@GearsAndGains1]

I think it’s reisfleisch, is that because my car is rice? 😢

[@isaacnavarro5681]

bro doesn’t know about the pure 900

[@GearsAndGains1]

I actually didnt know there was a Pure 900! I assumed so but damn that thing must make some crazy power!

[@Thatn55]

I hate the active grills

[@GearsAndGains1]

I hate them too. They always break & they never open at the right time 😢

[@bingoplayer]

Wait...did he say he likes ecutek😅😅 like 10million times.

[@GearsAndGains1]

Sorry 😂 my original part of the video got deleted so I had to re-record at the end 😂 ecutek is the goat!

[@bingoplayer]

@@GearsAndGains1so you do like ecutek😁

[@mr.twotone4552]

Grab your balls and spend the money cost about 10k I got pure 850, port injection upgraded spool hpfp motive reflex, upgraded lpfp. I’m around 650-700hp next is I gota drop 6k for a trans build

[@giovannidiliberto7702]

Why would u do all that to a 3 series I mean I know ur cars fast as shit but why not just get an m340i and do that the body style looks way better I mean I guess if ur not running stock suspension and tires it will feel nice

[@GearsAndGains1]

I think I might just end up getting a G80 soon! We’ll see but if the money is right, I’ll just buy one of those

[@touayaaj84]

Sorry but you are putting out false information about different tuning platforms. All the tuning platforms use the same VE tables. There is nothing different when it comes to tuning. The only difference in the tuning platforms are features. The most important thing is asking your tuner what they use or is more comfortable using.

[@GearsAndGains1]

My tuner Visconti told me Ecutek is the most advanced software in his opinion. RK Tunes says MHD is the most advanced. They both say it's because it lets them do more to tune the car. I'm just repeating what tuners have told me. ECUTEK is used for high HP GTRs, Lambos, and other crazy drag builds. MHD is mainly for BMWs

[@touayaaj84]

@ 😂 they do the same thing in all cars. They modify the same tables. The only difference is the user interface, like Windows and Apple. It’s like using Safari or Edge.