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S4 Downpipe options

Boosted_Six Mar 24, 2018

  1. Boosted_Six

    Boosted_Six Member

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    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.
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  3. Daggerit

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

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    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 Member

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    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

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    Holy ****!
     
  6. Boosted_Six

    Boosted_Six Member

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    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

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    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

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    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.


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  9. Boosted_Six

    Boosted_Six Member

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    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 Member

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    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.

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    Any update on the DP? Tempted to get it as a Christmas present to myself!
     
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  13. Boosted_Six

    Boosted_Six Member

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    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 saloon Audi S4 Audi A6

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    Any noise clips?
     
    mattfinn likes this.
  15. Boosted_Six

    Boosted_Six Member

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    Sounds like this guys car basically:
     

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