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  1. #1
    Established Member Two Rings
    Join Date
    Feb 26 2015
    AZ Member #
    317413
    Location
    United States

    Upgrading to the K04... questions

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    I am currently about to drop my K03 and install a K04. I want to use my current cat, for now, and I am wondering if the K04 will fit on a OE cat.

  2. #2
    Senior Member Two Rings
    Join Date
    Jan 04 2014
    AZ Member #
    137991
    Location
    Hong Kong

    if it is K04-15, yes.


    Sent from my iPhone using Tapatalk
    02' A4 1.8TQ 5MT | HONGKONG
    K04-15 | Uni Stg2+ | TT225 MAF | TT225 Injector | AWE DV | Customer 3" FMIC | HFC | 3" Cat Back | ABT Quad-exhaust |
    Lightweight Pulley | HFP | Brembo 6 piston | Defi Controller | B7 RS4 FB Steering | Carbon Hood | Carbon Trim | Full Caracter bodykit | S4 Door Blade | 18" Sportec | Michelin PSS 225/40/18


    Going to have some fun on speaker

  3. #3
    Established Member Two Rings
    Join Date
    Feb 26 2015
    AZ Member #
    317413
    Location
    United States

    Thanks

  4. #4
    Veteran Member Four Rings texasboy21's Avatar
    Join Date
    Apr 01 2007
    AZ Member #
    16891
    My Garage
    2017 Mustang GT Performance Package, 1983 Chevy Silverado
    Location
    houston texas

    The K04-015 is a K03 with a 1-2mm larger compressor wheel (cant remember). All of the stock components will work (manifold, inlet pipe, etc) as it is designed as a mild upgrade over stock.

    Expect about 15 extra peak HP over a K03 with a "big injector" tune, and a slightly more broad powerband.
    2005.5 6 speed with the Premium, Lighting, Sport, and Cold Weather packages

    Pag Parts EFR 6758 kit, Pag Parts intake/FMIC/manifold/downpipe, Eurodyne Boost Manager Plus, Eurodyne Maestro, StopTech 332mm BBK, Stasis Touring suspension

  5. #5
    Veteran Member Four Rings jonan's Avatar
    Join Date
    Nov 25 2006
    AZ Member #
    13655
    My Garage
    B7 RS4 - STG III B6 A4 - Mini R56 S
    Location
    Austin, TX

    k04 is a gateway drug to bigger turbo land...
    Want my guns??? ΜΟΛΩΝ ΛΑΒΕ!!!

    B6 Mods:
    Fully Built Motor w/ GT2860RS and all supporting mods : My Build Thread

    RS4 Mods:
    RNS-e MKII : Milltek : ECS SS : JHM Spacers : Deflapped IM : UM Tune

  6. #6
    Senior Member Two Rings
    Join Date
    Jan 04 2014
    AZ Member #
    137991
    Location
    Hong Kong

    wanna sell my K04 upgrade to bigger......


    Sent from my iPhone using Tapatalk
    02' A4 1.8TQ 5MT | HONGKONG
    K04-15 | Uni Stg2+ | TT225 MAF | TT225 Injector | AWE DV | Customer 3" FMIC | HFC | 3" Cat Back | ABT Quad-exhaust |
    Lightweight Pulley | HFP | Brembo 6 piston | Defi Controller | B7 RS4 FB Steering | Carbon Hood | Carbon Trim | Full Caracter bodykit | S4 Door Blade | 18" Sportec | Michelin PSS 225/40/18


    Going to have some fun on speaker

  7. #7
    Veteran Member Four Rings jonan's Avatar
    Join Date
    Nov 25 2006
    AZ Member #
    13655
    My Garage
    B7 RS4 - STG III B6 A4 - Mini R56 S
    Location
    Austin, TX

    Quote Originally Posted by uzone02 View Post
    wanna sell my K04 upgrade to bigger......


    Sent from my iPhone using Tapatalk
    lol, i've had my k04 for less than a month and am already ordering a GTRS, rods, injectors, and a motoza tune...
    Want my guns??? ΜΟΛΩΝ ΛΑΒΕ!!!

    B6 Mods:
    Fully Built Motor w/ GT2860RS and all supporting mods : My Build Thread

    RS4 Mods:
    RNS-e MKII : Milltek : ECS SS : JHM Spacers : Deflapped IM : UM Tune

  8. #8
    Senior Member Three Rings
    Join Date
    Feb 24 2008
    AZ Member #
    25668
    Location
    USA

    It is indeed a gateway to more power lol. I love how my car pulls so hard off the line and around the city with the K04, but definitely leaves you wanting more up top. I know if I want over 300ft/lbs+ I'll have to do rods so its just a matter of committing to tearing everything down to support something bigger. I'm running 440's on a custom Malone tune so I should be OK on fueling but it'll probably run better on a 550 since the spray pattern is better for our 5v head.

  9. #9
    Veteran Member Four Rings jonan's Avatar
    Join Date
    Nov 25 2006
    AZ Member #
    13655
    My Garage
    B7 RS4 - STG III B6 A4 - Mini R56 S
    Location
    Austin, TX

    Quote Originally Posted by PSI NRG View Post
    It is indeed a gateway to more power lol. I love how my car pulls so hard off the line and around the city with the K04, but definitely leaves you wanting more up top. I know if I want over 300ft/lbs+ I'll have to do rods so its just a matter of committing to tearing everything down to support something bigger. I'm running 440's on a custom Malone tune so I should be OK on fueling but it'll probably run better on a 550 since the spray pattern is better for our 5v head.
    yea, i'm going with 550 injectors and the stock fuel pump with motoza...can't wait till all my shit comes in...

    sucks though, cause i'll be travelling A LOT for work until the end of june so i won't have time to install everything...i'm going to put together a comprehensive word doc with all of the bentley/hayes illustrations, torque specs, clearances, etc while i'm on the road to keep me busy until then...that way i can go into the job confidently since i've never tore a motor apart before...
    Want my guns??? ΜΟΛΩΝ ΛΑΒΕ!!!

    B6 Mods:
    Fully Built Motor w/ GT2860RS and all supporting mods : My Build Thread

    RS4 Mods:
    RNS-e MKII : Milltek : ECS SS : JHM Spacers : Deflapped IM : UM Tune

  10. #10
    Senior Member Three Rings
    Join Date
    Feb 24 2008
    AZ Member #
    25668
    Location
    USA

    Quote Originally Posted by jonan View Post
    yea, i'm going with 550 injectors and the stock fuel pump with motoza...can't wait till all my shit comes in...

    sucks though, cause i'll be travelling A LOT for work until the end of june so i won't have time to install everything...i'm going to put together a comprehensive word doc with all of the bentley/hayes illustrations, torque specs, clearances, etc while i'm on the road to keep me busy until then...that way i can go into the job confidently since i've never tore a motor apart before...
    Sounds like a solid plan of attack. 1.8's are easy. There's a bunch of youtube videos on how to tear them down and rebuild. Might be worth checking out if you want to give yourself a break from the word doc

  11. #11
    Veteran Member Four Rings jonan's Avatar
    Join Date
    Nov 25 2006
    AZ Member #
    13655
    My Garage
    B7 RS4 - STG III B6 A4 - Mini R56 S
    Location
    Austin, TX

    Quote Originally Posted by PSI NRG View Post
    Sounds like a solid plan of attack. 1.8's are easy. There's a bunch of youtube videos on how to tear them down and rebuild. Might be worth checking out if you want to give yourself a break from the word doc
    already watched a few of those videos...my dad was a naval engineer so he was big on the whole measure twice cut once thing...the word doc is mainly for my own confidence going into the job and to make sure i don't mess anything up when going through the checklist of things to do...
    Want my guns??? ΜΟΛΩΝ ΛΑΒΕ!!!

    B6 Mods:
    Fully Built Motor w/ GT2860RS and all supporting mods : My Build Thread

    RS4 Mods:
    RNS-e MKII : Milltek : ECS SS : JHM Spacers : Deflapped IM : UM Tune

  12. #12
    Senior Member Three Rings sleepwalker_gsr's Avatar
    Join Date
    Jul 08 2010
    AZ Member #
    61188
    My Garage
    Your mom, tied up.....
    Location
    sacramento CA

    Quote Originally Posted by fishstick41 View Post
    I am currently about to drop my K03 and install a K04. I want to use my current cat, for now, and I am wondering if the K04 will fit on a OE cat.
    Dont install a K04! save ur cash and get a GT series or something. WAY better. I had a ko4 and it was a waste. IMO
    2003 B6: GT2871R turbo, Snow Performance Water Meth, Motoza tune, FMIC, Straight pipe, ECS RA4 Stage2 Clutch, 034 fuel pump, 034 TIP, Bosch 550cc injectors, fuel rail, 008 DV, Carbonio intake, coilovers, S4 door blades, USP front bumper and painted lowers.

  13. #13
    Senior Member Two Rings
    Join Date
    Jan 04 2014
    AZ Member #
    137991
    Location
    Hong Kong

    Quote Originally Posted by sleepwalker_gsr View Post
    Dont install a K04! save ur cash and get a GT series or something. WAY better. I had a ko4 and it was a waste. IMO
    but for who usually drive in city
    K04 is still a good little step up from ground

    Quick spool, peak at 4k and slowly drop

    DM me if you want it.


    Sent from my iPhone using Tapatalk
    02' A4 1.8TQ 5MT | HONGKONG
    K04-15 | Uni Stg2+ | TT225 MAF | TT225 Injector | AWE DV | Customer 3" FMIC | HFC | 3" Cat Back | ABT Quad-exhaust |
    Lightweight Pulley | HFP | Brembo 6 piston | Defi Controller | B7 RS4 FB Steering | Carbon Hood | Carbon Trim | Full Caracter bodykit | S4 Door Blade | 18" Sportec | Michelin PSS 225/40/18


    Going to have some fun on speaker

  14. #14
    Senior Member Three Rings sleepwalker_gsr's Avatar
    Join Date
    Jul 08 2010
    AZ Member #
    61188
    My Garage
    Your mom, tied up.....
    Location
    sacramento CA

    A GT2871r is much better than K04 in almost every way. Only thing i'm not a fan of is the lag but once it hits its awesome. still able to DD and you'll save money in the long term because ur not buying another turbo when you want to upgrade again. the most HP you can really expect is 200 to the wheels with the GT im at 260 WHP. Worth it imo.
    2003 B6: GT2871R turbo, Snow Performance Water Meth, Motoza tune, FMIC, Straight pipe, ECS RA4 Stage2 Clutch, 034 fuel pump, 034 TIP, Bosch 550cc injectors, fuel rail, 008 DV, Carbonio intake, coilovers, S4 door blades, USP front bumper and painted lowers.



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