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    • Akrapovic releases catless downpipes for the S63 V8 in the X5M and X6M

      S63 twin turbo V8 owners now have another downpipe options courtesy of Akrapovic. The piece itself is made out of stainless steel and is catless. No additional details were supplied. We would like to at the very least know the cost and claimed power gains. A dyno would definitely be warranted as well. Akrapovic makes quality exhaust pieces but without further details it makes for a very weak product unveiling. Akrapovic pieces tend to be expensive so do not expect this to be a value in S63 tuning.


      This article was originally published in forum thread: Akrapovic releases catless downpipes for the S63 V8 in the X5M and X6M started by Sticky View original post
      Comments 15 Comments
      1. G0TB00ST?'s Avatar
        G0TB00ST? -
        They look cool, but lets see what they do on the dyno...
      1. GetSomeE92's Avatar
        GetSomeE92 -
        Probably won't be worth the gain at their price. I'll bet they are somewhere in the $1500 range.

        Also, found this:
        http://www.gtspirit.com/2012/01/16/o...bmw-x6-m-x5-m/

        According to that website, gains are 11 hp and 15Nm.
      1. SpeedLimit?'s Avatar
        SpeedLimit? -
        will it be possible to install them without dropping the motor?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by GetSomeE92 Click here to enlarge
        Probably won't be worth the gain at their price. I'll bet they are somewhere in the $1500 range.

        Also, found this:
        http://www.gtspirit.com/2012/01/16/o...bmw-x6-m-x5-m/

        According to that website, gains are 11 hp and 15Nm.
        Those gains seem to be referring to the rear section and not the downpipes.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by SpeedLimit? Click here to enlarge
        will it be possible to install them without dropping the motor?
        @ar design should be able to answer this as well as @Jimefam
      1. GetSomeE92's Avatar
        GetSomeE92 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Those gains seem to be referring to the rear section and not the downpipes.
        I couldn't tell from the article whether they were referring to the cat-back or the entire exhaust system when providing the gains.
      1. Jimefam's Avatar
        Jimefam -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        @ar design should be able to answer this as well as @Jimefam
        Don't know about the X5 or X6 but I can't imagine you'd need to drop the motor. On the 5 series it is very simple to get them in an out.
      1. onurleft's Avatar
        onurleft -
        This will be great to reduce heat soak, a common problem in the N54, and i'd imagine in the TT S63 with all that weight
      1. Sticky's Avatar
        Sticky -
        Some more info but nothing for just the downpipes by themselves:

        The Evolution system with optional downpipe (example with tuned engine):

        Stainless steel downpipe set
        Titanium link pipe set with resonators
        Titanium X-pipe
        Titanium muffler with integrated exhaust valves
        Hard facts:

        Plus 61 HP (at 4,700 rpm)
        Plus 114 Nm / 84 lbs-ft of torque (at 3,800 rpm)
        28 kg / 62 lbs. lighter than stock
      1. larkinda's Avatar
        larkinda -
        Has anyone installed these- is there any drone? How's the sound? I have Akrapovic cat back now on 2012 x6m and am considering getting the Downpipes but am worried about drone from the cat delete. Any input would be appreciated.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by larkinda Click here to enlarge
        Has anyone installed these- is there any drone? How's the sound? I have Akrapovic cat back now on 2012 x6m and am considering getting the Downpipes but am worried about drone from the cat delete. Any input would be appreciated.
        Don't know anyone here running these but you can be confident with Akrapovoic quality.
      1. larkinda's Avatar
        larkinda -
        Anyone have any brand catless down pipes installed?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by larkinda Click here to enlarge
        Anyone have any brand catless down pipes installed?
        No, you might want to talk to @ar design though as they have probably the best option.
      1. larkinda's Avatar
        larkinda -
        I'm looking at running the akrapovic DP but my dinan tune isnt comparable. The shop recommended renntech tune as they will add the cat delete to their tune. Claiming 650 Hp with renntech and exhaust. Anyone have experience with renntech? Im not crazy about having to ship ecu for flash.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by larkinda Click here to enlarge
        I'm looking at running the akrapovic DP but my dinan tune isnt comparable. The shop recommended renntech tune as they will add the cat delete to their tune. Claiming 650 Hp with renntech and exhaust. Anyone have experience with renntech? Im not crazy about having to ship ecu for flash.
        Nothing wrong with having to ship the ECU.

        Yes, Renntech will do a custom tune for you and for your DP's. You can be very confident with their work, stellar reputation.