Are KO4 Turbos the best choice?

[@boostbook3747]

I say we throw quad turbos on her fellas..

[@hostessking3632]

Boost Book that would be the funniest thing ever

[@Nightwalker86]

Real talk you will blow the motor before you ever max out a proper tial setup.

[@teamslowboizb5_s484]

Boost Book im just gonna ask cause I just picked up my audi s4 b5. On your exhaust and downpipe video did you do the job yourself or no?

[@boostbook3747]

Jamie Khan The car came with the exhaust setup.. although I would have rather done it myself!

[@jadenbrijalba1823]

K04 ALL THE way .. plug and play , tuning from ECS , Uni, or APR and reliable . I love GTI they're cheap to get going fast. and very reliable !

[@Snickerguy19]

Blew my ko3 turbo in my 2013 GLI. Upgraded to the Ko4 with an APR (Ko4) Tune and will never look back.

[@glena8823]

Still holding up?

[@peterharren8909]

You've got my vote for the RS4 K04. As I've probably said before, I did hybrid them with the compressor off an RS6 so as to keep the intake temperatures down for reliability. I'm the 3rd owner of these turbos and the rumor was that the first owner ran them at very high PSI. At the time I had to get a stud on the turbo to exhaust manifold fixed, which meant an engine drop and so I took the opportunity. The short of it is that my turbos are about 15 years old, were rebuilt once about 9 years ago, and have about 20 weekends of track time on them. They are reliable! One other thing bigger turbo folks miss is that the exhaust manifold is basically not upgradable, there's little space to do so. The manifolds on the RS4 and S4 are the same. Given this, much bigger turbos have to run very high PSIs to compensate and that's not great for spool up and I might venture turbo life. The other, as you have rightly said, is that we drive lower end torque, not high peak HP.

[@ProjectCarTV]

That’s actually not true about the exhaust manifolds. The RS4 ex man’s are designed differently and have larger ports.

[@GermanEliteTuning]

You overshot the price a lot man. You can build a solid stage 3 k04 car yourself for less. Custom tune is the way to go for sure. The k04 cars I have tuned perform very well.

[@that_white_civic]

German Elite Tuning what do you charge for tuning?

[@GermanEliteTuning]

86Cherokee lerado thx for asking. What type of tune do you need?

[@that_white_civic]

German Elite Tuning looking for like a stage 1 2.7tt or even stage two just exhaust front mount and I’ll be going to k04s here whenever I get them I want the rear o2 deleted as well as the other junk that’s useless looking to be closer to 400horse?

[@GermanEliteTuning]

86Cherokee lerado awesome I suggest going stage 2 it’s $250. Email me at [e-mail] and we can talk more about it.

[@bradcarpenter1881]

German Elite Tuning Just subscribed to you man! I've had an 01 b5 s4 for the past 4 years that has needed some major maintenance which I plan to do in the next few months but once I get it back together would you mind if I reach out to you in regards to tuning and other modifications? Very interested in your advanced timing tune and what that entails.

[@s4racewars596]

K04's with mild tuning make an excellent street car! I went with Franken F4H's and am now upgrading to Franken F21MF. I would never hesitate to recommend K04's or F21's. Many years of events seeing them run strong consistantly!

[@peterharren8909]

There are certainly more fun turbos out there than an RS4 K04. But 15 years of hard use (20 weekend of track use) have me convinced. I'd rather use my money elsewhere than doing multiple engine pulls and paying maybe $2-3k ($4-5k if you are paying someone) for new hardware and a tune each time. I'm also not feeling like rebuilding an engine or blown turbos.

[@s4racewars596]

In years of following along in the B5 S4 world, I have concluded my personal favorite setup is 2.7T with drop in rods, RS6-frames turbos (OEM or K24 hybrids) and E85!

[@peterharren8909]

Nothing like sinking $10k in a car that might be worth that much. 😀 Then there’s all the while I’m at it things....

[@s4racewars596]

"While I'm here..." It's a passion and a hobby, not going to make money on it! Smiles per Mile to the max!

[@sabirdynastystudios]

I got the IE K04 on mk6 gli and apr stage 3 tune. Great turbo! Love the video man. Very informative. These turbos handle extra mods fairly well including WM and e85. Mine is at 400 chp as a daily driver.

[@Killer_Wagon]

Ko4 is hands down one of the best Gotta love my strokes 3.0L with the gt28’s tho(:

[@cleophasgaillard3872]

very helpful comments as I am currently upgrading my turbo

[@KYoss68]

Funny thing about the "Chinese turbo" apprehension; I have a brand new borg-warner K04-015 sitting in a box in my living room waiting for me to install it in my B5 Passat (1.8t, 4motion, 5sp manual) and when I unboxed it and examined it, I saw "Made in China" printed on the serial number plate riveted to the compressor housing. I'm not sure how I feel about that yet.

[@Mike-bt3ki]

Borgwarner has 2 big factories in China

[@janinstuning5495]

Xs power has a k04 kit which include the turbos, 550 cc inj, and inlet pipes for $1300. Another 250 got me my downpipes with resonator.. They work deals and have great quality.

[@hsantiago189]

John Dawson how long have you had the XS power turbos

[@janinstuning5495]

Hector Santiago this is the cheapest i would go who is reputable and offer warranty... Im still waiting on bigger intercooler and a bigger radiator, and a tune.. It bolts up and sounds way 😎. Cars are expensive mechanics are underpaid, story of my life... They are good quality for what you pay.. They gave me 550 cc injectors with it... i think theyre serious😁

[@janinstuning5495]

Turbos bolted directly up, i had to clock a turbo a tad but good fitment as if was oem. Hopefully i can go back in with my motor today. Ill post a video with my results soon!

[@NOTSOSLIMJIM]

Screw those guys. Bought their turbos and they mailed me a set of $200 turbos. Had to make a claim on them.

[@lolz616]

I have a Fusion Sport, which has the Ford v6 Twin Turbo Ecoboost engine in it with All Wheel Drive... I did some research and I believe Ford uses the Borg Warner turbo not sure which turbo but its definitely a twin turbo by them.. so these things must be pretty reliable if a big automaker is slapping them on there star engine in the F150 lineup and there Fusion Sports... that is quite the bulk order lol a freaking fusion that puts down 380 pound feet below 3,500 rpm with All Wheel Drive such a sweet car

[@smokinblu81]

My s4 avant has k04 (wasnt built by me) but I think it runs great! I need to do some up grades and tuned it a bit to see how much I could get out of it... Supposedly I have around 320-340hp, with these mods, rs4 dps, chip tuning from sportec with exhaust from kat, im pushing max 18psi but holding 17psi... Im hoping to get some better intercoolers, 85mm maf and a good tune, hoping to get in the 400s hp

[@luislanda2228]

Reliability comes to the tune aswell. BW k04 turbos are a great choice but after few monts you get used to the power and dont fill fast anymore.. I am running RS6 turbos now but if i had to go back maybe TTE 550s or 600 and will never run them to their full potential unless you built you engine.. 550s should spool quicker then my RS6s.. But BW k04 are bery good.. Good luck on your build. I also recoment jhm stage 4 cluth combo..

[@barfly246]

BorgWarner has built its 5 millionth turbocharger at its manufacturing facility in Ningbo, China. Since 2005

[@hostessking3632]

Love my srm k24/rs6 turbos. Sooo much fun

[@GermanEliteTuning]

Hostess King yah buddy SRM k24s all the way.

[@gregoryfairchild2460]

My goal is around 500hp reliable daily. My 2004 A6 C5 S-Line 2.7t

[@Nightwalker86]

The KO3, KO4, and F21 are all going to be about comparably reliable give or take. If you ask them to push too much air or don't watch cooling properly, you will make any of them fail. If you do your build properly and drive responsibly, they will last just fine (even stage 1 on KO3). It's not like they have inherently worse engineering for no particular reason. I think you are way overrating the reliability of the KO4 in a relative way. Turbos are considered a wear item on the B5 and should be treated as such.

[@tyler141]

Couldn't be happier with my F21s. Take a look at a few videos in my channel ... e85 soon :)

[@lallinnBESTI]

and the guy in crazy shirt talking about k04 the whole time = power of k04

[@MatthewTaylor3]

This video needs to be condensed as I feel what is said here is repetitive. The K04 is indeed a good OEM upgrade, but he hasn't addressed the anticipated turbo lag over the K03. The F21 would be a better choice in my opinion if cost is an issue, and one just wanted to replace a damaged K03. Personally I've upgraded my MK5 GTI to a F23T, with supporting mods and couldn't be happier for the past 2 years running reliably. The added cost of the K04, would have brought peace of mind, but could have been used for additional car parts. Repairing turbochargers is no longer a huge expense once you can buy the CHRA online, and install it yourself.

[@jeffryperkins219]

Nah Gt2871r’s for dayz

[@jadenbrijalba1823]

5k$ on APR

[@vwjet357]

Jaden Brijalba get an ATP stock location turbo then, still cheaper.

[@Boaters_hub]

Thought the ko3s was the better option? Since larger exhaust turbine🤔

[@zachclay6091]

There are alot of reasons the k04 is a solid upgrade. Builds more & sustains more boost faster then a k03 can. While not having to worry about it blowing up.

[@wickedmajestic8100]

I got ko4 on mk1 Audi TT Quattro

[@gregoryfairchild2460]

I have over 200k on stock k03s with bad egt's and secondary air leak somewhere...comical sounds on cold start...howling puppy..lol

[@beefysghost867]

Check out turbo concepts k04 turbos, just put one on my mk4 jetta

[@beefysghost867]

@DON'T LOOK AT MY CHANNEL stage 2 js just a tune with some basic bolt ons, that is what I did. Havent looked back. But downside to k04 is if not tuned right you will have a new viewing window in your block. They are torque monsters compared to the ko3s. Just do your research, you won't regret it

[@sebastiantan2212]

Hi Boost Book. May i ask you a question? Hybrid Turbo K04. Is It a better choice? For K04 turbo can i run on stock Intercooler? Anything i need to Uprated?

[@HPAa3]

Sebastian Tan I may be a little late to the party, but IMO. It is better. Forgoing the borg-warner I went with HPAMotorsports fully machined ko4 for my A3 2 years ago. I went full build on this car which cost quite a bit. After I crashed it. I went with HPA again for my other A3 with only the turbo being the upgrade. You will not maximize all the power capable, but it is very noticeable. Latter car still on stock components sans turbo.

[@bonecc4061]

Are they better then the gt28?

[@jakobaganon10]

are you ever gonna e85 tune your s4?

[@frankjeen5028]

Can I put a ko4 tubro on my 1.8t audi a4 b6 without blowing up my engine?

[@luisrew12345]

You can but then you would need to remap the ECU to get it to work properly along with some other supporting mods as well so it works as well as it should. Putting on a KO4 on the stock ECU, you have the risk on killing your engine.

[@bethanyhaskiell9116]

I had a xs power k04 xlb turbo running on a stage 2+ tune for 2 years igot ran great I had ev14 550cc injectors 3 inch dp and borla catback it ran pretty close to my c5 stage 1 6speed

[@Lu-gm9mx]

What supporting mods

[@paulattree4171]

@@bethanyhaskiell9116 Hi i know this is an old thread but maybe you are the person that can advise me. I have an a4 2006 cabrio 1.8T bfb engine . i have just put the same turbo as you had os turbo xl . the car had a stage1 tune i had done 6months ago with the k03. With the new k04 do i need injectors and or another remap and fuel pump. Any advise would help me. Thanks Paul

[@bethanyhaskiell9116]

@@paulattree4171 in order to get the full potential out of the kO4 you'll need injectors and a remap for those mods.A k04 on a ko3 tune can cause over boost problems which will cause it to go in limp mode any time you get into boost real quick so I got the Bosch 550cc injectors for pretty cheap they are everywhere and get a k04 tune for the injector size and you won't have to deal with the boost cut issue

[@001-j7l]

TTE550

[@5261g]

I am legit a noob on cars I have my turbo geometry stuck (because it’s dirty I think), can someone recommend me something? Audi A4 1996, 1.9TDI Diesel 110hp Thank you

[@beefysghost867]

@DON'T LOOK AT MY CHANNEL yes not much hp but with stage 2 tune basic supporting mods and you be at over 300 tq

[@demringstho913]

What is the name of the song in your intro

[@Tougesti]

NCS - Feel good

[@nathantransport8493]

F21's are china turbos 😂 buddy you need somemore info

[@gregoryfairchild2460]

If the Ko3 and Ko4 are the same make, why believe the K04 is going to last

[@CourtlandMiller1994]

Gregory Fairchild man the k03 is a great turbo in and of itself, it just can’t handle the boost that a k04 can so when you start loading higher pressures and tuning you run the risk of blowing the k03 whereas the k04 will be able to handle it.

[@thegreatkwyjibo5529]

You don't have to pull the engine out to replace the turbo

[@jadenbrijalba1823]

Lol right K04s are plug and play

[@b5Bart]

on a 2.7 theyre decent, on a 1.8t k04 is a complete waste of time

[@Dom-wg1pk]

Rs6 rs turbos from jhm, cost 2000, better hp

[@salberini]

I have these on my b5, amazing value. Ppl hate bc they're partially made from Chinese parts.

[@UDFuse]

I can get you a set for 2300

[@photorocket4550]

Two sayings in the business of going faster: "How fast do you want to spend" and "Saving money, rarely ever does"