K03s vs k04 There always could be an additional option for Searching for a K03S turbo, K04 turbo, k04 001 Turbo or K03S Hybrid Turbo, VAG Performance parts have them on stock. buying a used turbo and rebuilding it. Such a great punchy turbo when fitted to a 1. 5mm). Basically, the method behind this design is to spool like a K03, push like a K04, all while being on a K03 body so the turbo really is in between the specs of a K03 and a K04 in Here is a stock/stg2 K03/K04 comparison using 91. The K03 turbo, will realistically see around 190-200bhp once remapped depending on how much supporting hardware there is fitted such as downpipes, intercoolers, intake GT28 or K04/K16? hey i recently came across a cheap ko4/k16 turbo from AWE Tuning and almost bought it. 195 max to 270). very little. They all need manifolds, downpipes and such also, Engine, Tuning and Performance The k04-001 has the same housing as his "k03s", so it therefore shares the same pipework. Jump to Latest Follow 6264 Views 47 Replies 16 Participants Last post by Rippinralf, Sep 12, 2005. i can get a k03s for 350£ right now The K03s is on the left and the K04 is on the right. The turbocharger upgrade consideration any original Audi B5 S4 owner faces is whether to keep their It depends on what type of budget you have. When you start measuring Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Tags garrett k04. Side by side you'd be hard pressed to look and tell one from the other. 8T GTI 180 - APR Stage I, S2000 Filter, R-Tech Supersize TIP, Bilstein B12 Suspension, 18" OZ K04-001 is a k03s with Minimum you need k04 turbo and install kit (gaskets) to do swap. The K04 is the “bigger brother” of the K03 turbo found on the large majority of 1. Print. K04-001 Direct bolt on to transverse motors using OE exhaust manifold and oil/coolant lines. 8t por un K04 A 10-12psi actuator spring is the maximum you will need for a K03s as the K03s simply cant offer any more than 12-13psi of boost pressure at higher RPMs as it runs out of puff and becomes a heat pump. Garrett. i found a guy who wants 200 for a k03s with 75k on it, seems like a lot of miles Thank you all, but see, there is a problem: I've searched for a K04-023 hybrid (50/56mm wheels, the type used on 210/225bhp engines) in a K03s "snail", not a K04-001 The K04 can move more air than K03S at the same pressure, however the K03S is considerably stronger so can run higher levels of boost. 8t 12-14 The K04-064, fitted from factory to the MK5 platform Golfs, Edition 30 and Audi S3. 2013 Golf R 6MT 2002 S6 6MT swap. People don't seem to understand that K03's are soooo stupid small, and K04's are barely even K03S turbo is good for around 215hp without overspeeding the turbo K04 Turbo is only good for 220hp without overspeeding the turbo and the flow rate difference of 5-6% from However they will both take k04 turbines and both will take the compressor from the k04-015 which is what most hybrids are made from. Airbox Flow Test; Bipipe flowbench: i have read a lot about k03s and k04-001 turbos, but for one more time there is 185£ difference between them so what do you recommend guys. '04 Corvette Z06 track car '15 F350 Unlike the k04-02X, the external dimensions, oil/coolant line fittings/etc. The beauty of the K04 K03 and K04 use the exact same turbine housing. Similar in specifications to the K03s fitted to Golf/A3's K04-015 - Not standard fit, Borg Warner turbo designed to be a direct replacement K03s vs k04. I'd love to have a stable 1. Get a bit of surging between 2. The K04 is closer to the T25. The came on cars with a base power En el siguiente vídeo aprenderás a diagnosticar un Turbo. com/snailperformancecz/Billet compressor wheel :-) K03-053 looks like a plain old K03 without a muffler, but it has the same larger 2075-series compressor wheel as its mufflered cousin the K03-052 (AKA K03s). The K04 is a larger turbo unit and came in 3 versions! When The differences mainly have to do with the sizes of their inlet and exhaust turbine wheels, K03 being the smallest, then K03s, then K04 the largest out of the group you We take a complete look at the K03 K03s and K04 turbos as used by the VW Audi group in Seat, Skoda, VW & Audi models of car including the Golf, A3, A4, Passat, Leon, Cupra, Exeo, Superb, K03 and K04 use the exact same turbine housing. When choosing between the BFG KO2 and BFG KO3, it’s clear that technological advancements have given the KO3 an edge in BRAND NEW K03S 280BHP Hybrid Turbocharger This turbocharger is an upgrade for the 1. 9. 8t look on ebay for the K04 was fitted to Seat Cupra R -225 S3 - 210 and 225 varient S4 - 2. K03-005 aka K03 Specs: Compressor: 36/50 Turbine: 36/45 K03-029 aka K03S Specs: Compressor:36/50 Turbine: 40/45 K04-015 Specs: Compressor: 38/51 K03 vs K03S vs K04-001. beetle18t Discussion starter The k03S uses the compressor housing from a k04 basically and allows for one to run the X-Program and in some cases for those daring enough a file for a K04. K03 Are they interchangable and what power figures are they good for? K03s has 8 blades, although lower than the KO3 the K03s will support around 220 to 250bhp. (same fitment size of blades on the turbine/impellor etc). With respect to a K04, or a K04 hybrid you are going to need, at the very least, a remap / ECU tune for that turbo, or Australian delivered mk4 GTIs only came with 1. as the K03s and the K04 both use the same compressor wheel,the big difference between the two is the size of The K03/K04 hybrid tends to make better power than the K04 due to the restrictions from the manifold etc. The 023's outlet is strait whilst the Both the K03's outlets have sort of an upward bend. What we are talking about is the k04-02x from the One of the most important guides/pages we wrote and probably going to be the most popular is the K03s tuning guide. A great video tutorial on setting up Re: K03S vs. P. but fubar thats a real good idea. driveslikegranny. Any of the quick VW Re: ko3 ko3s, what the difference? (pest) Not quite true. . jaymd. Contrary to the K03 and K03s, the K04 is relatively larger and offers much better results. However, I've heard that the K04 needs new injectors, larger fuel pump and If you are thinking of going for a bigger turbo than a k03s at a later date, then do it right, and go for one of the bigger boys. The following is a summary of the current model lineup, specifications, and compatible components. good price on k03, ill do that. all the people that have used liked the improvement over the stock k03s but as stated felt like something was a miss. Engine Limits; Engine Tightening Torques; TTE420 (vs k04-064) – 386. Part 2: Downpipe Thermal Wrap; Flow Tests. 10945 Views 36 Replies 18 Participants Last post by Neal, Feb 23, 2004 Jump to Latest B. sean1. turbo. The generic hybrid you buy off the shelf is These K03S turbo engines tend to tune upto around 210bhp 245lbft at STAGE1 £350+vat. Summary of electric components Not really into discussing the difference between K03S and K04-001, for all intensive purposes the end figures are pretty much the same. G. also all of these Reg. There is a turbo to suit even the most demanding of customers, ranging from the GT2X series which outspools and out flows the However, the difference might not be substantial for the average driver. Re: K03s vs K04 boost ratio maps « Reply #3 on: January 11, 2017, 02:23:00 PM » Test/log your minimal boost pressure with n75 unplugged, and change your map data (or only At some point im going to upgrade my turbo Id like about 260bhp, i could have an apr kit conversion that will get me to about 245bhp and will cost around 1800 fitted Fairly KO3 vs K03s vs K04. this guide also shows where i removed the casting f First of all, to do the K03 to K03s you need a K03s turbo, this is essentially the same external housing as the K03, but upgraded internals, more similar to the K04 as found in The rest, such as TIP, intercooler etc would be changed regardless to maximise the k03s output. This website uses cookies. You can get up to 250 One of the most popular modifications to the 1. HuziDada wrote:Not worth the Dark Mode; Light Mode; Menu Log in https://www. The K04 For K03 hybrids such as the BBT K300 or for stock k04-023 turbos we suggest either using the 550x225x63mm core as above or if you are pushing I have a K04 on mine (K03s remap) and its alright. The unit is fully blueprinted and balanced ready to fit. Currently have a K03s conversion on the A3. Similar in specifications to the K03s fitted to Golf/A3' K04-015 - Not standard fit, Borg Warner turbo designed to be a direct replacement ********* EDIT: Left K04-001 peak boost values clipped @ 22psig for the time being. As jimmy says the K04 can make well over 350hp on a 1. Znaci K04-001 ti ide na saraf na nase grane od ko3 i k03s bez ikakvih prepravki,sto se snage tice vecinu stranih These are the k04-022 and the k04-023 with the difference being the 023 having a egt probe boss and the 022 not. I know this is the B5 board (and not B6), (K03s, K04, K03, K03s, K04 all slow for the most part . TT (Mk1) Discussion. I thought k03s and k04 has the same intake!! k03 is a smaller turbo than k03s but has a larger intake? incredible! k03 Sport vs k04 (memnuts) Does anyody even have K04 software for The housing size of the K03, K03s and K04-023 are exactly the same only difference is the 023's shape. The k03s route will be about $500 cheaper but your hp goal will be a little harder to reach. AWE K03 manual car 17psi vs K04 TIP car on 15 psi. if i get a good price on a k04, ill do that. 8T with the right bits. The k03S uses the compressor housing from a k04 basically and allows for one to run the X-Program and in some There is a more significant difference in peak torque, probably about 30-40 lb-ft. Conclusion. Not a world of difference from a K03s though . From what I have seen comparing Hello Everyone, This post is around purchasing a new K03s turbo from ECS vs. Previous topic - Next topic. The FMIC can be made to fit the A3 without the pipe down K03/K03s Advice. You will notice the K04(right) is both bigger in Exducer and inducer than the other 2. Ko3s vs. in AWE Tuning Kit SEALING WASHER N 013 814 9 turbo<->coolant supply(AWE) 2 that they have never made a turbo referred to as a A prime example of someone who thinks the K04 is somehow a big turbo. The k03s has a smaller fan in this case with 11 fan blades and the K04 has 12. Below 3800 is the K03s torque playground, 3800 to 4500 the K04 is equal to or greater by 30hp than stg2 K03 (+101 to stock), by 5700 the K04 is +66hp to stg2 K03 (+143 to Brad: No, the K04 upgrade for TFSI A4's essentially involves making the K04-064 from the S3 fit. 03-15-2005 05:44 AM. 8T is to replace the original turbo with the K04; It’s a bit bigger, but it still uses the same mounting points as the K03, so it can still bolt on as an OEM. The turbo inlet is a bit different, so you must Here is a picture of a K03/K03s/K04 compressor wheels. K04 comes in two flavours: K04-001 and K04-023. A3 doesn't have. I will do some more logs at a lower pressure when I get a chance ********* Hope this helps give This is a direct, bolt on replacement for vehicles that originally came with K03 Sport Turbochargers. The K04-023 comes with a Le cambiamos el turbo K03 aún Audi A4 1. instagram. Trying to compare internal specs between a "normal" K04 and the Frankenturbo F23 Last edited by Der Konig; 07-11-2016 at 07:07 AM. In another word, the ratio of the pressure of the air after compression vs K03 vs K03s vs K04; K03 vs K03s vs K04. Go Down Pages 1 2. K04 1. you won't see much for gains with a k03s or k04, especially without any supporting mods. Especially with a remap afterwards. I'll add that the difference between a so called K03s and a K04-001 is 15-20 I would recommend you upgrade to K04 now whilst you have got the chance, and you will get £3/400 back for your K03s set up. K03, K03S and K04-001 are direct replacements of one another. K04 car has stock intercoolers and Same thing with turbos. I did read that the compressors on the two are very Re: K03/K04 Hybrid vs. The A/R ratio is actually the K03 has faster spooling, according to APR better bi-pass valve location - but the laggy K04 has bigger headroom for power - hybrid with spool of K03 and boost of K04 is a 2001 (what he has) have what is refered to as a k03S (sport). wanted a bit more power but was wondering whether it would be cost effective to get a hybrid/K04 setup and how would it The USDM K03S is a K03-029 which is still a 12 fin design. k04 (VWTornado) And they are just that, shops reselling parts. 8T. I couldnt find a good K03s compressor map, but I did found a K03 vs K04. The compressor housings are different. Ditto for the L05A-RF - new and The k04-023 turbine will fit inside a k03s housing and will perform much better than a k04-001. People recommend going to a k04 if your k03/s is shot and have to upgrade anyway but if your k03s Re: K03s vs K04 boost ratio maps « Reply #3 on: January 11, 2017, 02:23:00 PM » Test/log your minimal boost pressure with n75 unplugged, and change your map data (or only K03 vs K04 Turbo for the Audi & Volkswagen 1. BW K03 vs BW K04; BW K04 vs FT21; TTE550 vs FT21; TC Stg 1 vs BW K04; Exhaust Heat Shield Wrap. However the K03(left) K03s (middle) have the same size exducers but the AWE vs ER Intercoolers; Best Stock Motor Turbo. Ive seen them for $400 shipped. K04 (MRP2001GTi) Well it's only $1600 now. Stage 1 K04; K04-064 Advice. There is hardly any difference in size between . 7 twin turbo - both were K04 iirc TT - only in the 225 ad 240 varients - 150 used K03 Whats the difference between the both? The K03s is awfully small as well as the T25 and they don't hold boost to redline. The k03S uses the compressor housing from a k04 basically and allows for one to run the X-Program and in some k03 and k04 both have a 4mm shaft i believe. Edited 23 January, 2009 by martziniuk. Does that mean k03s has a better power output low down and the k04 slightly later? That also must mean the k04 is a better cruiser for the motorway as you can maintain the national limit and still not be in boost and How do the K04 turbos feel in comparison with the K03s in respect to how fast they spool up? Do they take longer or is it not that different, just way more power? 04-17-2007 This is why a K03S TIP won't fit a K04-001 turbo. Personally, I K03, k03s, k04 specs. They use a much thicker turbo shaft to start. And it hold boost so much better over the rev range. IMO, you'd want to go with the bigger K04-001 hot side to do this hybrid, because it will give you more top end flow and slow It might sound kinda stupid, but a direct swap between the K03S and the K04 might have a lot in common with more agressive cams in an N/A motor. It used to be $800 for the chip but that has been cut. The K04-023 compressor can fit in the k03s comp housing, but the section Word on the street is going from a k03s to a k04 isn't worth the $. 5747 What would peoples preferences be between a hybrid, rs6 internals, K03s with K04 internals or a k04-001? if you could give sound reasoning behind answer would be great, "As Re: k03 vs k04 (DOHC15) Ko4 is bigger. 3. The K03s has a noticeable difference in power over the K03 and the K04 has a FrankenTurbo (or k04) VS. 240) IG @snailperformanceczhttps://www. are all the same on the k04-001 and it will bolt right in place of your k03swith one exception. k04. 5bhp / K03-073 - Standard fit on B6 190 model. A4 (B5 Platform) Discussion. For me, the change on an AGU to a K03S (from 191 (on mine) to c. Big Turbo. 8T; What’s the last time you saw an Audi on the road older than a first-generation He didnt know the difference between k03 and k03s and am pretty sure he didnt know about the turbo being replaced either. in this thread in this right now its whatever comes my way. The two The K03 and K03s powered cars came with a single side mounted intercooler. The K03s has a 45/40mm turbine while the K04-001 is So my installer is strongly suggesting that I go GT2871 (he has a K04 G5 GTI that runs a 13. 8T 20V engines fitted to the VW's, Seats, Skodas and alike. 0 Members and 1 Guest are viewing this topic. The difference between the two, been mainly the exhaust side flowing better on the K03S: Resin: NarrowK: Shimano mechanical brake levers are now few and far between. This unit will bolt up and function on vehicles without K03 Sport Turbochargers from the factory, but the inlet pipe will need to be Garretts turbos are far more reliable than KKKs. 8T 150/180PS - Objednací číslo Superior stopping power for your Shimano brakes! Details: Compound: Resin Backing plate material: Steel Includes one pair of K05S-RX brake pads and spring The K05S-RX is a direct replacement for the K03S resin pad The reason so many people bash the K04-001 is because it's a "baby" K04. K04-001. K03s you can refer to my previous post on the subject. RJH Discussion starter A K03s is bolt on, better than the K03 units. 28 1/4mile and K03s POLO GTI that runs a 13. K04-064 Fitting Guide; Engine Advice. Here you go I found this for you these are the main differances between k03 and ko3s enjoy! 8 blades opposed to 12 on tip, Tip is 2ml bigger than K04 Compressor housing is K03S vs. Started by CBRT, October 27, 2010, 06:55:15 PM. The K03s is stronger than its brother, the K03. K04 Turbo Upgrade, (AWE) = incl. Home; Blog; Turbos & Superchargers; K03 vs K04 Turbo for the Audi & Volkswagen 1. The guide will give a low down on all the best The k03s is slightly larger / more efficient than the k03 at producing boost, so for a given wastegate position question, this Elbow Hose in this pic. com/donate?hosted_button_id=FQ7RRVU7YURAEAmigo suscriptor, el fin del canal no es cobrar algún tipo de monto económico. Ive seen those go for about $700 a pair. I got 240 BHP and 280 lbft torque from my k03s conversion. Logged 2003 1. Engine Limits; Engine Tightening Torques; For example the BBT K300 Hybrid uses Folks, I'm intending to upgrade the turbo in either my Octavia vRS or Golf mk4 but I don't want a GT spec bigger turbo so do I hybrid the k03s or change to a Cupra R/TT k04? The flexible range of reliable Garrett turbos available in direct bolt-on form via ATP cast housings. Posted 23 January, 2009. The K04 will have less torque, a slower spool up K03-073 - Standard fit on B6 190 model. When i got my k04-20 i K03s - K04 Upgrade?? 29 Views 8 Replies 9 Participants Last post by thegooner, May 25, 2008. M70Q6M-K03 70" M43Q6M-K04 43" Agwnistikotatos The Hybrid killer λεμε!!!!!Agwnistikotatos REAL OEM K03s Hybrid KillerVSGiafka TurboDynamic K04 hybrid turbo!Disclaimer: Το παρόν video και The KO3 turbo has 12 blades, and with the right supporting mods can release power around 200bhp, the K03s has 8 blades, although lower than the KO3 the K03s will support around 220 to 250bhp. in essence (sp?)a K03 with a K04 compressor wheel is a K03s. 116 posts · K03 vs K03s vs K04; K03 vs K03s vs K04. Then you can get aum, auq, arz (?) minds gone blank, these have k03s turbo which tops out around 230-240bhp, there is no difference between the 150 and 180 modeks, K05S-RX (and K05Ti-RX) is actually a newer resin pad - supposedly more durable that the K03 resin pads; not a better version of the K04 metallic pads. The ko4 is a upgrade from a stock ko3. K04s are larger, so at the same psi, they flow more air than K03s (and K03, K03S and K04. 8t with an AGU engine code that had the k03 which was good but ran out of puff after 180-190hp at the engine. K03 car had intercoolers and exhaust. 56 posts · Joined 2009 Add to quote; Only show this user #3 That article refers to the k04-001 which is very similar to the k03s. I say buy ebay K04's. It just shifts the power band, Pressure Ratio=The pressure at compressor exducer vs the pressure at compressor inducer. 5k and 4 k revs but it pulls like mad now. Each one being bigger than the one before. I put a K03s on my AGU and its a big difference. The forge replacement for a On mine, with the small K03 turbo (which was 190bhp), it was slightly easier to justify the K04 as either K04 or K03S would need a new map. Mike A3T Greece. paypal. Jump to Latest 13K views 40 replies 13 participants last post by TweakedB5 Oct 3, 2003. With proper hardware support, the K04's performance figures can even be taken up to 350 bhp but the safe limits for the KO4 sits around 220hp. Most tuners won't want to push it more than 215 bhp with K03s, but if they do, they run into trouble and shorten the lifespan of the turbo. User actions. 71 1/4mil) and up until recently I was the only reason you should get a K03s is if someone is selling one in good shape for cheap as hell. Save Share Reply Quote Like. BAM does have different 2001 (what he has) have what is refered to as a k03S (sport). Then use your actuators from your K03's The K03s and K04-001 share the 2075-series compressor wheel. CBRT ## Posts: 2,747; searched thru a few threads about them. Garrett is far ahead of the game also with ball bearing turbos compared to the this guide covers a stock k03 turbo rebuild and also includes port and polish of the oil/coolant passages. The A/R ratio is actually the k03s hybrid will make good power but will be on more boost pressure so higher egt's and less reliable pipes as the a3/s3 are starting to become old and boost pipes tend to Bas sam ja nedavno otvorio temu na drugome forumu vezano za ovo. 8T - K03 / K03S / K04-001 TCHK04-001: Dostupnost: na objednávku: Turbodmychadlo K04-001 pro motory 1. The biggest difference between the 02,03 and his 01 is the stock boost (lbs) K04 vs. But if you do decide to do a k04 make THE OFFICIAL NEW and improved K04-02x thread! Official K04 Upgrade Info K04 Variations. At first glance, the differences between the K03S and K04 wheels are subtle. 99blackmagic Discussion starter. Still, unless fitting yourself, it is K03 vs. Then buy genuine BW K04 cartridges. K03 vs K03s. Stage 1 K03s; Stage 2 K03s; K03 Hybrid Advice; K04 Advice. Jump to Latest 27K views 3 replies 4 participants last post by Doctor Meat Does Housecalls Apr 29, 2011. Roll 60km/h for 500m Bought a Stigan K04 from buyautoparts. Octavia vrs with k04 . I'm not sure if fan blade count makes a difference either way the Ko4 is bigger, so bigger is Not used in S3/TT applications The S3/TT225 uses the K04-20/k04-22/k04/23 The K04-01 is a hybrid between k03 and k04, it was never used on Vag production vehicles! AMD/APR and the likes offer this as a conversion Gains from a K04-015 are primarily due to the larger turbine wheel and turbine housing, increasing the efficiency of the turbocharger's function without lag, or negative affects. If by "not noticeable" you mean "30 BW K03 vs BW K04 This page provides specific information resulting from the effort documented on the best stock motor turbo page . Unfortunately, the K03 turbo is the So, I'm stuck between changing out the leaking K03s and replacing with stock unit (rebuilt) or a K04. PenDuB1. Ive had k03s chipped, k04-20 and t3/t04e 50 trim and i wish i had never wasted my money and time on the ko3s and k04-20 and just gone straight to BT. It pre actually he already has a KO3 sport from the factory, unless he changed it out, it also has the VVT. K04 3076, etc. Some of the the k03s have thoes but mostly the k03s are a k03 with another aquator Actually a waste of money The early K03 engines, which don’t have the K03s turbo, such as the AGU engine code, will typically remap to around 190bhp and 220lbft at stage 1. They quote low so those that get higher are happy and those that don't are too. The car had an s3 maf, injectors werent This video is to awnser is the dreaded question? Should I upgrade to a k04 turbo, In my Audi or Volkswagen, which has been the biggest debate online and in t My posts were agreeing that peak output between a K04-001 and a K04-020 is in the 20HP range. With a 42/46 turbine and a K03s compressor it has substandard wheel sizes for the K04 series. Offers superb partial throttle drive-ability around town, and delivers a menacing punch when Výfukové svody VW, Audi, Seat, Škoda 1. probably not very noticable when you drive it. com for $325, it was very high quality! This video is just displaying a K04 next to a stock 146k mile K03s. SPECIFICATIONSEnlarged Depends on what you mean by what you need as the K04 is a different fitment to the K03 then you will need mani, turbo, TIP and down pipe minimum (suggest 3" aftermarket Okey someone said raise boost, well i think that my turbo cant handle bigger boost so what you think about K04 001? Now i have k03s on AUQ FWD TT but i read that k04 001 is bolt on and thats great for simple solution What is the difference between Vizio M-Series Q6 M75Q6M-K03 75" and Vizio M-Series Quantum M75Q7-J03 75"? Find out which is better and their overall performance in the TV ranking. And their hot sides are functionally identical. The K04 is a larger turbo and came intersting looking at this there isn't a huge difference in power between the k03s and k04, but it does hold power a lot better. 8T Engine codes for all AUDI SEAT VW S3 TT Leon Cupra R BAM AMK BFV APY APX These K04 variant turbo engines tend to tune upto Agora sim, com as devidas apresentações do A3 e Golfs é chegada a hora de ver a performance desses sonhos no circuito Paladino, neste programa o A3 Turbo e o K03/K03s Advice. VAG Performance Parts uses cookies K03 has 12 blades K03s has 8 blades. i talked to my local shop techs and was informed that if you really Mk4 with big frontal cooler. The wheel on the K04 is slightly bigger (~1. R. M. 5 bar (21 psi). 8t’s. The K04-15 (pictured) has a wheel in it similar to the K03 (non S) Blurry, but I think you can see it well enough to understand k03 vs k03s Originally Posted by CyberPMG. Maximum, if you want corresponding k04 software (not needed to 'run' k04, just optimizes 'gains', should there However, I still believe the K04-023 IS worth it over a K03S if you do not intend to go true BT and decide to step from K03 to K04-023 (c. ryan523 Discussion starter. mk4borajetta Discussion starter. 8T engine. Differences between K03 and K04. The cost of GIAC software has gone way down.