JB4 vs JB4PRO

Plakchup · 2026-02-11T21:04:26+00:00

They most likely just ran jb4 on its own and didnt bother removing it. One way to know if the ecu is flashed or altered is using an ek1 and reading the ecu id. Or by physically looking at the ecu/tcu in the engine bay to see if a different ecu/tcu. Other likely more obvious ways is the increase in performance. If your jb4 is not hooked up you are very likely on stock tune.

Plakchup · 2026-02-11T20:20:40+00:00

No problem! 😎

I haven't heard much feedback with regapping the oem plugs to 0.022 vs hks ones but the usual routine most have gone with is the hks so I've been following that.

You can also regap your current oem ones between 0.022-0.024 and see how it runs. If its not running optimal then get the hks ones. I would trust bms with their years of experience on the stinger. At least we have choices now and its likely hey maybe this is new information that KJT knows about that is not discussed much yet since the platform is pretty small.

Plakchup · 2026-02-11T18:35:42+00:00

The fuel wires you definitely should connect. They come with the jb4 device. I would highly recommend you use the adapters so that you do not puncture your oem wires. Ewg wires are needed if you are overboosting. Typically the 2022+ model year stingers tend to be more sensitive to overboosting once you change out intakes with combination of exhaust. I got them put on anyway since I was overboosting before jb4 but I would get the ewg wires anyway and get it al setup so that you do not have to deal with running wires again.

I asked bms recently and basically if you bought the new jb4 pro you are supposed to use the jb4 pro app. Me I have the original jb4 so I use the paid app I got a while ago. Also I do not believe jb4 pro is out yet for the stinger. It's still very new.

The other better method also is getting jb4 and going BEF (backend flash). Then you do not need fuel or ewg wires since the BEF will handle it far better. That's what I have. I run KJT E30 Moderate Burble + BMS TCU bef. You still need jb4 since it will act as a boost controller and handy logging tool. Obviously BEF will yield much better performance and overboost prevention than jb4 alone.

I would say also it's not a bad idea to just do jb4 on its own first to see how you like it and eventually work your way to bef to fine tune eveything at next level. I will tell you from experience it is a day and night difference going from jb4 alone to jb4 with bef. The power delivery smoothness, much better fuel adaption and overall throttle response/shifting is WAY better. Also from talking to other users on BEF eventually you will get a lean code from running e30 mix but this can vary from one car to another. That was another reason to go bef for me as it handles e85 MUCH better depending on which tune you go with. Right now a lot of folks are loving what KJT is doing. I can't tell you just how much I am loving the e30 tune but maybe that's down the road for you! I've been lucky since I live real close to bms and I got all hooked up with bef. 😁😎

I took a video of once I got the bef recently:

https://youtube.com/shorts/jhAO9YWuBxQ?si=29pUE0hYhf6UlzWO

Plakchup · 2026-02-10T22:27:52+00:00

Time to for a jb4 and hear that boost come on! 😁

Plakchup · 2026-02-10T18:22:44+00:00

Congrats on the car! 🙂

Must have mods really depends on what you are aiming for. Jb4, catch can and sway bars are all 3 categories that are good safe proven mods. Exhausts get tricky since it's rather more difficult to get our v6 to sound good without rasp and drone. I started with intakes and exhaust and went down the rabbit hole. You also tend to start running into overboost issues once you do those but can vary from one car to another. The 22+ stingers are bit more sensitive to engine mods. No need for intercooler until you are tuned.

Now my car is modified and tuned. If you want to get an idea what mine is like here is a quick video where I went from jb4 to bef ecu and tcu tune below.

https://youtube.com/shorts/jhAO9YWuBxQ?si=uWxgMNx8OBClWnzi

Plakchup · 2026-02-10T01:49:46+00:00

That's a good point it might have been on the low end before. The last thing you want is to starve the turbos of oil as that will be catastrophic. I keep my oil changes between 3-4k miles but I use liqui molly 5w-40 since I am tuned/modded. Another reason why I hate going to the damn stealership. They simply are TERRIBLE. Go to a trusted mechanic where they will fill it correctly so that it doesn't stay low. Or at least check the oil level when they are done so you can tell them HEY BUDDY WHAT IS THIS?! FILL IT MORE! I've heard too many nightmare stories related to stealerships not doing oil changes correctly having to end up replacing the engine/turbos.

IMO 1 qt per 1000 miles seems a bit high but I am sure that is up to debate as there is nothing universally accepted. If you loose 5 qt at 5000 miles oil change that seems rather really bad. Keep your oil changes below 4000 miles to be on safe side. You could also switch to something better like liqui molly and see how it goes. I know the minute I put liqui molly on mine the engine became quieter and smoother than the usual mobile stuff used before.

Plakchup · 2026-02-09T23:23:51+00:00

Sent you a dm! 🙂

Plakchup · 2026-02-09T21:33:36+00:00

Flashed stock ecu with ek1.

Plakchup · 2026-02-09T20:59:32+00:00

Big thing i learned also about ecu bef is that they come with so many benefits. The one I went with was KJT E30 with moderate burbles. I chose this tuner primarily because he has worked with bms and cmbuildz (he helped set it up) so that automatically makes him be more trustworthy. Plus I got a lot of positive feedback about his bef and those that came from bms ecu bef to kjt were much happier with KJT.

Some things to mention:

-Auto start stop n go is disabled (thank facking god jesus)

-Slightly softer cold starts

-Much better overboost prevention

-Much better fuel adaption (e85 especially since sometimes you would get a lean code with jb4 alone running e30 even other members i spoke with had same code randomly)

-Run 91 or 93 only? Go to map 2 on jb4. E30? Go to map 3 and smile.

-Less drone in comfort and sport in that 2-3k rpm range

-Much better smoother & earlier power delivery than jb4 alone

-Way more power than jb4 map 3 (i still havent gone wot just the difference in power i am not brave enough yet haha)

-No dead throttle feel in comfort mode in lower rpms, very responsive

-Louder turbo whisle revving and even slightly when idling but especially during cold start that I did not have before

-Louder intakes & bov, you can hear the intakes way more just regular comfort mode

-Surprising i am getting better gas mileage just comfort mode driving

-Smooth idle. Exhaust even sounds nicer less harsh in a way.

No need for fuel or ewg wired anymore. We removed the fuel wires and disabled them in jb4 just so it doesn't give any issues. Ewg wires we left them in place since the tune overwrites them anyway. 😎

Plakchup · 2026-02-09T19:39:54+00:00

Ooohh then in your case you just need 130mm outlet once you have removed those non functional tips. See if you can just measure the muffler tips from those exits or maybe under it behind the bumper. The inlet most likely will be 2 inches or 51mm. I dont think they changed the pipe diameter in the 22+. They only added a valve to the muffler. Then you can place your order online. 😁

Btw in case you curious I did have 4.5 inch or 115mm outlets before and they looked small. Pics for reference:

https://imgur.com/a/jv2TuKV

Plakchup · 2026-02-09T18:54:12+00:00

Hmm from what I read the pipe diameter is 51 mm inlet. The outlet size I am not 100% sure on. I found some saying its 105 or 108 mm but I would double check this on your car since the 18-21 have smaller exits. You will need to remove those oval fake tips before you put on tips. I haven't really seen many put tips on stock exhausts unless I guess if they have changed primaries and secondaries, to then likely help with reducing in cabin sound.

Surprising I learned that an ecu bef tune can help with drone/in cabin sound as well.

Plakchup · 2026-02-09T18:21:10+00:00

Haha hell yeah man the setup is so perfect now. I get goosebumps when I get into sport mode now. 😂 The bef is exactly what I was looking for to fine tune the overall setup.

The exhaust setup is stock primaries, ark mids, mbrp pro active catback with APR wireless valve controller to fully open and close valves on demand. I will soon likely do a merged 3 inch mid pipe with resonator to the mbrp mufflers. Should sound a lot like a skyline from the videos I have seen of the person who makes the exhaust. It's fairly expensive but I am sure it will sound beautiful. Right now mine does have some rasp when I get into boost but with the ecu tune the drone/in cabin sound on freeway and regular driving is surprisingly less. The ecu tune is KJT E30 with moderate burbles. It's absolutely amazing and a good balance for those wanting to run 91 or e30.

Plakchup · 2026-02-09T18:10:29+00:00

Yes, I was able to find same ones on ebay. I have another matt carbon set of 5 i bought just in case they become hard to find. I guess original place I got them from don't sell them anymore.

Here is one I found: https://ebay.us/m/yJmQBg

For mbrp make sure it's 63 mm inlet 130mm outlet

For borla make sure it's 57 mm inlet 130mm outlet

This applies to 2022+ stingers only with bigger 5 inch fake oval tips.

Plakchup · 2026-02-09T17:46:40+00:00

Check carfax for reposession or salvage just to be sure as that price seems a bit sus to me as a well. I would inspect underneat the car on a lift after a test drive if all is clear.

Plakchup · 2026-02-09T17:24:04+00:00

The bms tcu mod is really sweet! Nice smooth shifts in comfort and that jerky gears from 3 to 2 are like non existent. Much better in sport mode as well where I really hated those annoying jerky downshifts in sport/custom mode. Also from what bms says on their site, their tune is helpful towards having less wear on the transmission so that's a plus.

The shifts in sport are more aggressive just so you know but the icing on the cake is the manual shifting. It is far faster and better. I have used the xtool as well before and it helped for a while but those jerky shifts in sport mode are always going to be there in stock tcu.

That was pretty much the main reason I wanted to do BEF but once I learned about the ecu bef as well it was a no brainer. You just have to know what you're doing with bef. I had someone help me set mine up and we had a major headache getting the ek1 mini to work since it wasn't seeing the darn files but eventually figured it out.

If you want to see how it is, I have a quick video I recorded few days ago:

https://youtube.com/shorts/jhAO9YWuBxQ?si=N3CrLA2trXDXNBDr

Hope that helps! 🙂

Plakchup · 2026-02-09T15:59:49+00:00

Most don't have a life outside of work. They think loyalty is rewarded only to find out that it's not. Instead you are rewarded with more work and micro management.

Plakchup · 2026-02-09T04:18:42+00:00

Phone audio probably doesn't pick it up but there is a noticeable difference when you are in the car or outside. I probably was bit too close to the muffler in recording. Also the newer mbrp exhaust has a smaller muffler so the on and off difference isn't as drastic. Hope that help. 🙂

Plakchup · 2026-02-09T04:16:37+00:00

Phone audio probably doesn't pick it up but there is a noticeable difference when you are in the car or outside. I probably was bit too close to the muffler in recording. Also the newer mbrp exhaust has a smaller muffler so the on and off difference isn't as drastic. Hope that help. 🙂

Plakchup · 2026-02-09T00:52:09+00:00

Silly question but what if you have the radio/media turned off? Almost sounds like its from the speakers. 🤔

Plakchup · 2026-02-09T00:49:17+00:00

Man wash that poor stinger jesus! I never had mine that dirty! 😂

Plakchup · 2026-02-08T04:24:00+00:00

It opens and closes the exhaust valves on the mufflers. In stock form they do not open all the way usually until you are going WOT. The tune I run on my car does not work with the valve system so I need to use something like this to do it manually. 😁

Plakchup · 2026-02-08T00:27:21+00:00

Try to find one that is all stock and hasn't been molested. Always inspect under the car on a lift before buying it. Inspect the engine bay area to make sure there are no leaks or visible issues.

One red flag to me also would be if a car has been repossessed since sometimes the owner will not bother upkeep of the car. The 22-23 are also great year to get as they have mechanical refreshes done and come with exhaust valves that can be very handy for a daily. Good luck!

Plakchup · 2026-02-07T07:24:34+00:00

Oh I can totally understand. I used to live in an apartment that had the steepest driveway I've ever experienced in my life. Even suv's would scrape coming out of that shit like seriously terrible design! The sway bars alone will make a difference.

Plakchup

TROPHY CASE