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  1. #1
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    B6 Brake Upgrade

    Hi Guys

    been searching the forum for a clear answer on brakes and upgrading them but i cant seem to find the certain answer to my question.

    i want to upgrade my brakes on my 2003 Audi A4 2.5TDi Quattro as i feel i just get too much brake fade and the car is too big for the brakes it has on.
    i am running genuien Audi RS6 18inch Alloys with 10mm spacers on the front, i want a straight forward bolt on upgrade no messing about i want the calipers to bolt on and to slip the discs on bleed and hey presto ( never that easy) but doable in half a day?

    i have been looking through ebay and this site and as far as i can see i have a few options

    S4 Calipers pre facelift 320mms discs or Facelift 345 discs ( if they would fit ) Braided lines and performance pads

    Audi A8 Calipers and 320mm discs

    Seat leon brembos ( not sure if they will directly fit )

    please let me know your thoughts ect and your ideas

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  3. #2
    ASHIHARA's Avatar
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    I have S4 b5 calipers 320x30mm on mine;post 106 Audi a8 2pot calipers 312x30mm discs

    B6 1,9TDI AVF SPORT QUATTRO AVANT

    Mods:RNS-e sat nav,Bluetooth,Rear camera,Full led interior/exterior,Cobra PCD,S4 B5 front brakes,S line body kit+S4 door blades,S line gear knob,RS4 B7 handbrake,RS6 wheels,EGR deleted,cruise control,custom leather & alcantara seats,tinted windows,A4 B7 arms & wiper blades,BV43 turbo,FMIC,custom remap(around 200hp and 368lb/ft tourque)

  4. #3
    marktdisport's Avatar
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    you using cheapo pads m8 or never changed your fluid never once had brake fade on mine..... even with a little abuse. for standard brakes i rate them big time tbh.
    A4 TDI 130 SPORT..
    now sold but still in the family, gone back in time to the cupra R again..

  5. #4
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    Realy? hmm i dont know i am fairly heavy footed. thanks for the fast response.


    i did fancy the b5 S4 upgrade BUT the B6 S4 upgrade use 345mm discs which might fill the wheels better?

    Any more ideas or recomendations

  6. #5
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    agree with tdi sport about the standard factory fit brakes, however if you do want to upgrade then B6/B7 S4 or B7 RS4 would be the logical choice......
    03MY 52 reg 1.9 TDi 130PS Quattro Sport Avant - 170bhp remap, RNS-E+OEM bluetooth, B7 wiper arms/blades, 4300K HID+nightbreakers/LED sidelights, rear tints, new lights all round, new front/rear screens, frt armrest, s-line kit, cruise/DIS, B7 gearknob/aluminium trims, parking sensors, black grilles, RS4 RARB, S4 front end, black 18" RS6 alloys

    Still waiting..... S4 rear bumper, exhaust tips, coilovers, leather recaro's.... phew...

  7. #6
    marktdisport's Avatar
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    ive got oem jurid disks n pads and rate them loads the last upgrade id be doing is the brakes unless you do have some pad issue's or fluid as been cooked m8....... imo my std one are brill my subaru sti brembos was much worse than the a4 using brembo pads etc...
    considering my subaru felt a much lighter car to stop
    A4 TDI 130 SPORT..
    now sold but still in the family, gone back in time to the cupra R again..

  8. #7
    quattrojames's Avatar
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    I've never found my 2.5q brakes lacking in anyway, I regularly commute in the middle of the night so can put them to the limit when opportunity presents. I'm inclined to agree something must be amiss with yours if they're that bad.

    B7 2.0T brakes are a popular mod too, I'm not sure on sizes as I've never really felt the need to look into it.
    Ingolstance Read about my A6 HERE.

  9. #8
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    hmm i might be in need of a brake fluid change possibly and a performance set of pads braided lines and grooved discs... will see would be nice to get a bigger set of brakes behind the wheels tho

  10. #9
    marktdisport's Avatar
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    sure would bud lol
    A4 TDI 130 SPORT..
    now sold but still in the family, gone back in time to the cupra R again..

  11. #10
    white.akita's Avatar
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    i think that the brakes can be adjusted for better performance with full vag com.
    2003 A4 2.5 TDI QUATTRO AVANT

  12. #11
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    realy how would this happen?

  13. #12
    scottshere's Avatar
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    Are the 2.5 brakes bigger than the 1.9 ?
    I would thinks so, but not sure

    How hard is the upgrade is so

  14. #13
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    2.5 brakes are 312 vs 288 for the 1.9, although I think 1.9q's might be 312 too but I'm not sure on that.

    White Akita, what settings on VCDS to do that, its a new one on me....!
    Ingolstance Read about my A6 HERE.

  15. #14
    "Stick a V8 in it!"

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    I have a pair of B5 S4 calipers in the garage.

    Drop me a PM if your interested.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  16. #15
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    Quote Originally Posted by quattrojames View Post
    2.5 brakes are 312 vs 288 for the 1.9, although I think 1.9q's might be 312 too but I'm not sure on that.

    White Akita, what settings on VCDS to do that, its a new one on me....!
    i swear my brakes are only 288mm... when i look on ebay they vary in size from 288-312mm...

  17. #16
    swarcup's Avatar
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    i recently replaced the discs and pads. I went for brembo max discs, these are grooved but not heavily, and a set of brembo pads,the improvement was amazing, nearly shot through the windscreen the first time i stamped on them. Also had a full fluid change, £30 at my local independant. Discs and pads cost £130. very happy
    2.5tdi Avant Q S 180 - 19" RS6 reps - chrome mirrors - ambient light package - cruise and dis retrofit - chrome side repeaters - front sline lowr conversion with cupra r splitter - rear lower valance with twin cut outs and exhaust tips - rs4 rear antiroll bar - puddle and footwell lights - sline door blades - fully colour coded - b8 autodimming mirror on custom window adapter - geuine aero wiper upgrade - genuine heated mirror upgrade

  18. #17
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    Quote Originally Posted by AudiAndy21 View Post
    i swear my brakes are only 288mm... when i look on ebay they vary in size from 288-312mm...
    I have been wrong before! That was my understanding, but Audi are never scared to throw a curved ball when it comes to spec levels!
    Ingolstance Read about my A6 HERE.

  19. #18
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    Quote Originally Posted by quattrojames View Post
    I have been wrong before! That was my understanding, but Audi are never scared to throw a curved ball when it comes to spec levels!
    True.. Audi do seem to enjoy putting different variants of everything on different models
    The alternator clutch bearing went.. The dealer said it could be one of many and i had to get the model number off the clutch!
    Cheaper than a new alternator though ;-)

    Mine is a 53 plate Sport.... Not sure if this throws things even wider on what it will have standard

  20. #19
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    I have just changed up from an 2.5tdi A4 Cab to an S4 cab, and the brakes are night and day. The S4 brakes feel so much stronger and confidence inspiring.

    So I would say its a worthwhile upgrade..

  21. #20
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    Sorry to thread jack ! What discs and pads you guys recommend ? Mines a 2003 3.0Q avant !!

  22. #21
    quattrojames's Avatar
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    Quote Originally Posted by Paul100 View Post
    I have just changed up from an 2.5tdi A4 Cab to an S4 cab, and the brakes are night and day. The S4 brakes feel so much stronger and confidence inspiring.

    So I would say its a worthwhile upgrade..
    I'm guessing the 2.5 cab being a 163 had 288 discs though?
    Ingolstance Read about my A6 HERE.

  23. #22
    scottshere's Avatar
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    Quote Originally Posted by aragorn View Post
    I have a pair of B5 S4 calipers in the garage.

    Drop me a PM if your interested.
    You still got the calipers?
    A4 1.9TDI Sport - 130 (B6) / Mods: None yet, just getting the basic right first

  24. #23
    gavsman's Avatar
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    Quote Originally Posted by quattrojames View Post
    I'm guessing the 2.5 cab being a 163 had 288 discs though?
    What I have seen is that most model's have the 288mm brakes, but the 3.0 petrol is the one that had the 312mm brakes.

  25. #24
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    B6 Brake Upgrade

    We've discussed this before, and I 'think' its the quattro models that have the 312mm brakes.
    Ingolstance Read about my A6 HERE.

  26. #25
    Pabs's Avatar
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    1.8t 190's also have the 312mm
    A4 1.8T 190 S-Line, Stage 2 Shark Performance Map 230 BHP, Pipercross Panel Filter, Forge 007 DV, Blue Flame Performance Exhaust + High Flow Sports Cat, 8k HID Lights, 8k HID Fog Lights, LED Sidelights, LED Number Plate, Front + Rear Ambient Lighting, LED Interior Bulbs, Grooved Dimpled Disks, Ultimax Pads, RNS-E DVD, Tinted Windows, S4 Grill, Votex Rear Skirt, BOSE, Leather, Engine Covers, S4 Mirrors, RS4 Pedals, Gloss Black Wrapped Grills, 19" BBS LM's Summer, 19" RS6's Winter, Coilovers

  27. #26
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    i'll have ago at taking a measurment in the morning but pretty sure mine was also 312mm fronts..... also theres 2 sizes of rears and mine had the bigger disc ones....
    A4 TDI 130 SPORT..
    now sold but still in the family, gone back in time to the cupra R again..

  28. #27
    scottshere's Avatar
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    Quote Originally Posted by marktdisport View Post
    i'll have ago at taking a measurment in the morning but pretty sure mine was also 312mm fronts..... also theres 2 sizes of rears and mine had the bigger disc ones....
    Mines the Sport the same as yours. I wonder if this has uprated disks to the bigger 312's as it does have uprated/lowered springs/shocks
    A4 1.9TDI Sport - 130 (B6) / Mods: None yet, just getting the basic right first

  29. #28
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    Sport and SE models have the same size brakes.
    Ingolstance Read about my A6 HERE.

  30. #29
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    A few year ago i had a 2002 b6 1.9tdi awx 130bhp remapped and after he mapped it he told me to go for a bit of a drive to see if i was happy with the improved power, which i was very happy but i also noticed my brakes were not as sharp as they were before the remap even at slow speeds. I told the tuner this and he told me that there were a few settings for the brakes, he then plugged his laptop back in and within 10 mins my brakes were back to razor sharp. They were definately adjusted electronically.
    2003 A4 2.5 TDI QUATTRO AVANT

  31. #30
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    Lol,02 plate 2.5 tdi sport fwd definately 312mm as just replaced them with brembo discs & jurid pads
    find they work very well.Will throw some braided lines on & some dot 5 in just because the car has turned
    over 118,000

  32. #31
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    You might find with Dot5.1 the pedal spongey.
    Atlas Grey A4 2.5 TDI Quattro Sport.
    Mods so far: Cruise control, DIS, Heated Mirrors, Tuning box, Xenonx, Centre Arm Rest, MFSW, RNS-E, SDS and Aero Wipers.
    To do: None yet.
    Next: Auto dip rearview mirror and Folding Mirrors.

  33. #32
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    mines deffo 288 can i just get some confirmation what 321mm brakes will fit ? will the s4 brakes fit the twin piston caliper ones?

  34. #33
    marktdisport's Avatar
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    Quote Originally Posted by PhatOne View Post
    Lol,02 plate 2.5 tdi sport fwd definately 312mm as just replaced them with brembo discs & jurid pads
    find they work very well.Will throw some braided lines on & some dot 5 in just because the car has turned
    over 118,000
    excactly the same as ive just fitted to mine m8 brmbo disc and jurid pads i find them brill if im honest
    A4 TDI 130 SPORT..
    now sold but still in the family, gone back in time to the cupra R again..

  35. #34
    scott b's Avatar
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    Quote Originally Posted by AudiAndy21 View Post
    mines deffo 288 can i just get some confirmation what 321mm brakes will fit ? will the s4 brakes fit the twin piston caliper ones?
    yes but you WILL need wheel spacers if your wheels are oem

  36. #35
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    cheers mate i have 10 mm already on the front what year s4 brakes should i go for and will i just need the calipers carrier and discs?

  37. #36
    docurley's Avatar
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    I have a full brake setup from a B7 2.0T that I'm looking to sell but need a idea what they are worth if anyone knows.
    Black Audi RS4 2006 Exclusive edition, Black optic option (stock for now)

  38. #37
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    I paid £250 for a full S4 setup with hubs and driveshafts.

    I've put 2 links to S4 setups off the B5 in the ebay section going for low monies.
    Atlas Grey A4 2.5 TDI Quattro Sport.
    Mods so far: Cruise control, DIS, Heated Mirrors, Tuning box, Xenonx, Centre Arm Rest, MFSW, RNS-E, SDS and Aero Wipers.
    To do: None yet.
    Next: Auto dip rearview mirror and Folding Mirrors.

  39. #38
    docurley's Avatar
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    OK cool, just looked at them and also found just caliper for a B7 2.0T at £280 so a full front and rear setup for £350 should be a bargain.

    OEM Brake Upgrades

    B6A4 1.8t-
    Same Caliper as B6A4 3.0
    Front Rotor: 288x25
    Rear Rotor: 245x10 or 255x12

    To check size of rear rotor, remove and check part #:
    8E0 615 601 P = 245x10mm
    8E0 615 601 D = 255x12mm


    B6A4 3.0- Same Caliper as B6A4 1.8t
    Front Rotor: 312x25
    Rear Rotor: 255x12

    B5S4
    Front Rotor: 321x30
    Rear Rotor: 256x22

    B6S4- Same Caliper as B7A4 & B7S4
    Front Rotor: 345x30
    Rear Rotor: 300x22

    B7A4- Same Caliper as B6S4 & B7S4
    Front Rotor: 320x30
    Rear Rotor: 288x12

    B7S4- Same Caliper as B6S4 & B7A4
    Front Rotor: 345x30
    Rear Rotor: 300x20

    Black Audi RS4 2006 Exclusive edition, Black optic option (stock for now)

 

 

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