1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

S4 Downpipe options

Boosted_Six Mar 24, 2018

  1. Boosted_Six

    Boosted_Six Active Member

    130
    101
    43
    http://millteksport.com/exhaust.products.cfm?variantid=1554

    For the B9 S4 / S5 it looks like Milltek have three options:

    • Cat bypass / Test pipe
    • Milltek downpipe using 200 cell HJS core
    • HJS EC Approved 200 cell downpipe
    Its obvious the cat bypass is illegal for use on the road so I will skip to the other two. The question is... Is the Milltek 200 cell cat still UK road legal if it isn't EC approved? Will it trigger a C.E.L? Will it invalidate insurance even if declared, as it's a non compliant part of the emissions system?

    If the answer to any of the previous questions is yes, what is the point of it even being developed and sold, as the only sensible option is to buy the HJS EC approved version for driving on the street? I'm confused as both the Milltek own brand and HJS item seem to be using the same 200 cell core, one has some heat insulation and the other not. So is the 600 quid difference purely down to the HJS own brand one having undergone the rigor of approval?
     
    Daggerit likes this.
  2. Avatar

    Google AdSense Advertisement


  3. Daggerit

    Daggerit Well-Known Member Team Floret Silver TFSI Owners Group Team V6 Audi S4 Audi Avant Owner Group quattro

    3,092
    1,568
    113
    I don’t know the technicalities in terms of the law regarding it to be honest. I’d imagine so long as it can pass it’s MOT then I imagine it would be considered legal?

    In terms of price, how much is the HJS one? If it’s more than the Milltek then you’re talking £1,500+ surely? That’s a lot for a downpipe!


    Sent from my iPhone using Tapatalk
     
  4. Boosted_Six

    Boosted_Six Active Member

    130
    101
    43
    The Milltek branded item is 1200 - 1400 pounds and the HJS one is 2000 - 2200!
     
  5. Daggerit

    Daggerit Well-Known Member Team Floret Silver TFSI Owners Group Team V6 Audi S4 Audi Avant Owner Group quattro

    3,092
    1,568
    113
    Holy ****!
     
  6. Boosted_Six

    Boosted_Six Active Member

    130
    101
    43
    I've emailed both the UK disti and the US disti for comment. The UK is completely non committal on CEL for either item, but says both with pass emissions testing.

    The US chap says hes been running the Milltek item on his personal B9 S4 for 8-9 months with no CEL.
     
  7. SMI77

    SMI77 Australia Audi S4 Audi Avant Owner Group quattro

    476
    246
    43
    Sorry mate, can not resist.
    The HJS, is that English pounds or Scottish pounds? :wink new:
    http://www.hjs-motorsport.de/products/tuning/ece-downpipes.html
    With that cost, no surprise one of their 'partners' is ABT!
    A European outlet does have them for Euro 2088 = GBP 1840.

    Closer to the Highland budget:-
    http://www.all-stars-motorsport.com...cts-turbo-decat-downpipe-cts-exh-tp-0009.html
    "FREE SHIPPING TO EUROPE OVER 250€" - so, are you people 'in' or 'out', at this point in time?
     
    Daggerit likes this.
  8. Daggerit

    Daggerit Well-Known Member Team Floret Silver TFSI Owners Group Team V6 Audi S4 Audi Avant Owner Group quattro

    3,092
    1,568
    113
    Didn’t realise that CTS had an option but I wouldn’t want to go decat because the CEL would **** me off...

    I’ll maybe just save for the Milltek 200 cell version.


    Sent from my iPhone using Tapatalk
     
  9. Boosted_Six

    Boosted_Six Active Member

    130
    101
    43
    The Chap in the US saw a 10th of a second drop from the 0-60 time with a catback, once he added the 200cell downpipe, he dropped another 0.4 of a second. Thats got to be close to 3/4 of a second off the quarter mile from a downpipe alone, no tuning!
     
  10. Boosted_Six

    Boosted_Six Active Member

    130
    101
    43
    Quick update: bought the Miltek 200 Cell non EC item. This choice was based on the logic that its a OEM quality HJS core and anecdotal evidence that this doesn't trigger a CEL. Will find out soon enough...
     
    A12RNX and Daggerit like this.
  11. mattfinn

    mattfinn There ain't no party like an S-Club Party.

    848
    23
    18
    Any update on the DP? Tempted to get it as a Christmas present to myself!
     
  12. Avatar

    Google AdSense Advertisement


  13. Boosted_Six

    Boosted_Six Active Member

    130
    101
    43
    1650 miles sans CEL

    Looking good so far...

    Best the ******* triggers when I least expect it now.
     
    A12RNX likes this.
  14. A12RNX

    A12RNX Active Member TeamMisano Team V6 Audi S4 saloon Audi A6

    233
    174
    43
    Any noise clips?
     
    mattfinn likes this.
  15. Boosted_Six

    Boosted_Six Active Member

    130
    101
    43
    Sounds like this guys car basically:
     
  16. Boosted_Six

    Boosted_Six Active Member

    130
    101
    43
    3000 miles... still no CEL
     
    Daggerit likes this.
  17. Boosted_Six

    Boosted_Six Active Member

    130
    101
    43
    7500 miles covered and no CEL in sight. The Milltek is a winner!
     
    A12RNX likes this.
  18. Popeye64

    Popeye64 New Member

    3
    1
    3
    Hi, I had a Miltek cat back fitted to my S4 B9 last year. The guys that fitted it told me they wouldn't advise putting the Miltek Sports Cat and down pipe on as it can throw up fault codes so the engine needs a remap at the same time. Is this true or a lot of cods whallop?
    Thanks.
     
  19. Daggerit

    Daggerit Well-Known Member Team Floret Silver TFSI Owners Group Team V6 Audi S4 Audi Avant Owner Group quattro

    3,092
    1,568
    113
    Well since there’s no remap it would make that part pretty difficult... Haha.


    Sent from my iPhone using Tapatalk
     
    Kondax likes this.
  20. Popeye64

    Popeye64 New Member

    3
    1
    3
    Yep That's true. I did a ring round last week still no joy on anyone releasing one soon. Anyone heard anything?
     
  21. Daggerit

    Daggerit Well-Known Member Team Floret Silver TFSI Owners Group Team V6 Audi S4 Audi Avant Owner Group quattro

    3,092
    1,568
    113
    Nah. I’d expect big tuning places like Revo and APR to be amongst the first and they haven’t managed. I did hear they’d managed to tune it but the ECU wiped it as soon as the car was restarted, I don’t know how true that is and I’d love to know what power they managed doing that...


    Sent from my iPhone using Tapatalk
     
  22. Popeye64

    Popeye64 New Member

    3
    1
    3
    Ive been checking the APR website periodically still nothing on there. I would imagine the figures would be up in RS4 territory that's probably the main reason Audi have made it so difficult and so only gives you one option is parting with the extra £30k + to buy one. Its only a matter of time before someone cracks it.
     
    Daggerit likes this.
  23. cuke2u

    cuke2u Well-Known Member TFSI Owners Group saloon Audi A4 S-line owners group

    11,246
    4,409
    113
    I wouldn't be so confident, the best ECU tuners have been at it for years, and not just with Audi's either as the same unit is fitted to other manufacturer's vehicles as well. Audi are spreading tamper proof ECU's across the range also....
     
  24. Boosted_Six

    Boosted_Six Active Member

    130
    101
    43
    I've covered 12k miles with no warning lights and no error codes. As already stated, a remap does not exist for this car so those statements are wrong on all counts...
     
    Kondax likes this.

Share This Page