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  1. #1
    Veteran Member Three Rings gk1's Avatar
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    2014 SQ5
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    NJ->CO

    2015 Audi S6 H&R sway bars

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    For anyone interested:
    I have been contemplating installing sway bars for a while now. I've had them in the past on other cars but was never happy with the grease and the polyurethane bushings always seemed to wear quickly making noises.
    I wanted to try the H&R with the alleged grease-less bushings. But as many of you know H&R does not list an S6 sway bar option. Every other C7 has the option listed (2.0T, 3.0T even TDI).
    Also every manufacturer who does make an S6 bar uses that same bar on all C7 variants. I suspect (just speculation) that H&R do not indicate a sway bar option for air suspension cars as they offer their ETS lowering module for which I speculate again that their C7 bars may be incompatible with the ETS model. (Again, I don't know this to be true at all)
    I emailed H&R to ask why they don't list an application for the C7 S6, and their response was "...from what I can see it seems we just donít have testing done on them. Itís very well possible, I just donít have data to back it up."

    I decided to give them a try anyway and ordered a set. (I am only VCDS lowered 10mm)
    (Also my theory that they would fit is backed by Achtuning's research.)

    Anyway, I am still waiting on the mounting hardware kit to be delivered for the installation and I plan to install with stock end links (again noise related and I do not need ultimate anti-roll, just an upgrade from stock.) In the mean time I'll leave some data for the spec junkies and update once I get them installed.

    Front diameter 32.22mm (32mm)


    Rear diameter 26.29mm (26mm)


    Front weight 19 lbs 11 oz. (19.6875 lbs)


    Rear weight 12 lbs 4 oz. (12.25 lbs)


    For reference:
    P/N 70092 Front 32mm sway bar (2-way adjustable)
    P/N 71092 Rear 26mm sway bar (non-adjustable)
    (Included with bars)
    P/N HR33591 Front bar bushing
    P/N HR33271 Rear bar bushing

    If it doesn't work...no biggy. I'll put back the stockers and someone with an A6 will get a great deal in the C7 classifieds.

    Front sway bar adjustable holes are 20mm apart which should theoretically allow for about 25% higher rate in the hard setting over the soft setting.

    UPDATE: 4/19/2019 The H&R bars fit fine. See below.
    Last edited by gk1; Yesterday at 02:55 PM.
    2015 S6 Quartz Gray
    Black, Carbon, Night, Cold, DA, ACC, VCDS lowered, 034 Trans mounts, EuroCode Alu-Kreuz, APR Stage I (91) & TCU, Rohana RF2 20x9, 11.660@114.83 (4615lbs.)
    2014 SQ5 Glacier White
    Black Nappa, Carbon, B&O, NAV, 21's, stock 13.527@102.11 (4615lbs.)

    2012 S4 S-Tronic Monsoon Gray, Stage II 12.868@107.8 (4275lbs.)
    2008 A6 3.2Q S-Line Daytona Gray
    2007 A4 2.0T S-Line Ice Silver
    2001 S4 Nogaro Blue, Stage I 14.746@95.29 (3944lbs.)

  2. #2
    Established Member Two Rings MolonLabe300's Avatar
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    Chattanooga

    Subscribed. I can't wait to hear your review on them. Are they easy or hard to install?

    Sent from my Pixel 2 XL using Audizine mobile app
    13 S6 APR S2, Milltek turbo back, roc-euro, AMG coolant pump.

  3. #3
    Veteran Member Three Rings widebodyfx's Avatar
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    2016 RS7-P
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    Seattle

    Thanks for trying it out for everyone!
    ///TWCompetition 2016 RS7

  4. #4
    Veteran Member Three Rings gk1's Avatar
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    Quote Originally Posted by MolonLabe300 View Post
    Subscribed. I can't wait to hear your review on them. Are they easy or hard to install?

    Sent from my Pixel 2 XL using Audizine mobile app
    Dunno yet, but I'm optimistic. Should be the same as any other C7 install... I've done sway bar installs before so not really worried.
    2015 S6 Quartz Gray
    Black, Carbon, Night, Cold, DA, ACC, VCDS lowered, 034 Trans mounts, EuroCode Alu-Kreuz, APR Stage I (91) & TCU, Rohana RF2 20x9, 11.660@114.83 (4615lbs.)
    2014 SQ5 Glacier White
    Black Nappa, Carbon, B&O, NAV, 21's, stock 13.527@102.11 (4615lbs.)

    2012 S4 S-Tronic Monsoon Gray, Stage II 12.868@107.8 (4275lbs.)
    2008 A6 3.2Q S-Line Daytona Gray
    2007 A4 2.0T S-Line Ice Silver
    2001 S4 Nogaro Blue, Stage I 14.746@95.29 (3944lbs.)

  5. #5
    Veteran Member Three Rings gk1's Avatar
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    NJ->CO

    Quote Originally Posted by widebodyfx View Post
    Thanks for trying it out for everyone!
    NP. It is interesting H&R doesn't specifically list sway bars for the A7/S7/RS7 either but AFAIK they are the same size and shape as the A6.
    2015 S6 Quartz Gray
    Black, Carbon, Night, Cold, DA, ACC, VCDS lowered, 034 Trans mounts, EuroCode Alu-Kreuz, APR Stage I (91) & TCU, Rohana RF2 20x9, 11.660@114.83 (4615lbs.)
    2014 SQ5 Glacier White
    Black Nappa, Carbon, B&O, NAV, 21's, stock 13.527@102.11 (4615lbs.)

    2012 S4 S-Tronic Monsoon Gray, Stage II 12.868@107.8 (4275lbs.)
    2008 A6 3.2Q S-Line Daytona Gray
    2007 A4 2.0T S-Line Ice Silver
    2001 S4 Nogaro Blue, Stage I 14.746@95.29 (3944lbs.)

  6. #6
    Veteran Member Three Rings widebodyfx's Avatar
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    Jan 31 2009
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    2016 RS7-P
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    Seattle

    I'm interested in the stiffness of the H&R rear in comparison to the Eurocode rear, I tried the Eurocode rear in the soft setting and it wasn't stiff enough so I utilized the hard setting to get a better feel in the back. Achtuning lowered the price of the kit, was funny seeing the individual bars costing less than the kits on TireRack.
    ///TWCompetition 2016 RS7

  7. #7
    Established Member Two Rings 300zx2g35's Avatar
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    May 03 2016
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    SoMD

    Following for results. I loved my H&Rs on my S4 so definitely interested to see if they'll work for S/RS cars.
    2014 B8.5 S4 Prestige Avant
    Eventuri Red Kevlar Intake | Mertop Headers | AWE Track Exhaust| AWE Resonated Downpipes| EPL Stage 2 183/57 DP + DSG
    DIY E-Codes | Clear Lenses | LED Fogs | Vorsteiner VFF-102 | Eventuri Red Kevlar Slam Panel | Vorsteiner Carbon Front Lip | ECS Carbon Rear Diffuser | RS4 Carbon Spoiler | Audi ZubehŲr Side Skirts | Euro Tails
    Piano Black Surround | P3 Vent Gauge

  8. #8
    Veteran Member Three Rings gk1's Avatar
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    2014 SQ5
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    NJ->CO

    Quote Originally Posted by widebodyfx View Post
    I'm interested in the stiffness of the H&R rear in comparison to the Eurocode rear, I tried the Eurocode rear in the soft setting and it wasn't stiff enough so I utilized the hard setting to get a better feel in the back. Achtuning lowered the price of the kit, was funny seeing the individual bars costing less than the kits on TireRack.
    Yep, saw that too, no rhyme or reason why the kit is listed as more than the sum of the individual bars.

    As for stiffness I hope to be able to quantify that once I get them on, but not having tried any others I may not have a good basis for comparison.
    What I do find interesting is the H&R is only front adjustable and the rear is non-adjustable. (I wonder if H&R recognized lowered cars on a theoretical hard setting could have clearance issues like what Eurcode discovered and addressed with their fitment kit and H&R just decided to avoid it altogether by making the rear non-adjustable. Just a theory anyway.)
    2015 S6 Quartz Gray
    Black, Carbon, Night, Cold, DA, ACC, VCDS lowered, 034 Trans mounts, EuroCode Alu-Kreuz, APR Stage I (91) & TCU, Rohana RF2 20x9, 11.660@114.83 (4615lbs.)
    2014 SQ5 Glacier White
    Black Nappa, Carbon, B&O, NAV, 21's, stock 13.527@102.11 (4615lbs.)

    2012 S4 S-Tronic Monsoon Gray, Stage II 12.868@107.8 (4275lbs.)
    2008 A6 3.2Q S-Line Daytona Gray
    2007 A4 2.0T S-Line Ice Silver
    2001 S4 Nogaro Blue, Stage I 14.746@95.29 (3944lbs.)

  9. #9
    Veteran Member Four Rings wwhan's Avatar
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    Mar 26 2010
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    The front H & R bar fits the C7 S6 fine and seems to handle about the same as the Eurocode front bar (with the rear Eurocode bar).
    2016 S6 Sport

  10. #10
    Veteran Member Three Rings gk1's Avatar
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    Quote Originally Posted by wwhan View Post
    The front H & R bar fits the C7 S6 fine and seems to handle about the same as the Eurocode front bar (with the rear Eurocode bar).
    Good to know. Thank you.
    Also did you install the front on soft or hard setting?
    Last edited by gk1; 04-15-2019 at 07:05 PM.
    2015 S6 Quartz Gray
    Black, Carbon, Night, Cold, DA, ACC, VCDS lowered, 034 Trans mounts, EuroCode Alu-Kreuz, APR Stage I (91) & TCU, Rohana RF2 20x9, 11.660@114.83 (4615lbs.)
    2014 SQ5 Glacier White
    Black Nappa, Carbon, B&O, NAV, 21's, stock 13.527@102.11 (4615lbs.)

    2012 S4 S-Tronic Monsoon Gray, Stage II 12.868@107.8 (4275lbs.)
    2008 A6 3.2Q S-Line Daytona Gray
    2007 A4 2.0T S-Line Ice Silver
    2001 S4 Nogaro Blue, Stage I 14.746@95.29 (3944lbs.)

  11. #11
    Veteran Member Four Rings wwhan's Avatar
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    Quote Originally Posted by gk1 View Post
    Good to know. Thank you.
    Also did you install the front on soft or hard setting?
    Soft
    2016 S6 Sport

  12. #12
    Veteran Member Three Rings gk1's Avatar
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    Aug 06 2014
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    2014 SQ5
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    NJ->CO

    UPDATE: (They fit)
    Installation completed.
    As expected the front H&R bar fit fine and was significantly easier to install as many have pointed out.
    The rear H&R bar also fits fine but as everyone says it is a PITA to remove and re-install. I temporarily removed the heat shield for the air suspension pump and one wheel to get more room. There is plenty of clearance around the air suspension pump with the heat shield back on and the H&R bar. Also the bushing clamps were extremely hard to get off the rear bar. Destroyed the rear rubber bushings getting the clamps off of the bar.
    Going slowly and on ramps only, I would estimate it took about 3-4 hours rear and 1-2 hours front. Again, I was going slowly as I have rushed in the past and it is usually worse for me than just taking my time.
    No noises clunks squeaks or otherwise on my test drive.
    As expected there is less body roll and the car corners flatter. I'm not one to cry to the heavens that it is the best thing since the invention of the light bulb...but that is just me. It is good...for me probably exactly what I wanted just a bit of an upgrade from stock...less body roll...flatter cornering...obviously zero comfort difference (they would not affect that anyway, but I know some people ask.) I have no experience with other brand sway bars so I cannot say if they are better or worse than others.
    That's it, sorry if expectations were higher but do keep in mind I purposely re-used stock end links. If you want something stiffer perhaps solid links would be a way to go. I also installed the front adjustment on the soft setting. Again I was not looking for max max, just a bit more than stock.
    Oh, Iím also still on 19Ē winter tires. Iím sure once I put the summer tires on itíll be more fun.

    Hope this is helpful to anyone out there. Please feel free to ask questions and I'll try to answer best I can.

    Front OE bar diameter 28.27 mm (28mm)


    Rear OE bar diameter 20.94 mm (21mm)


    Front OE bar weight 6 lbs 10 oz. (6.625 lbs) Very obviously a hollow bar. The H&R weighs 13 lbs 1 oz. more than the stock bar (bushings included)


    Rear OE bar weight 4 lbs 1 oz. (4.0625 lbs) Also very obviously a hollow bar. The H&R weighs 8 lbs 3 oz. more than the stock bar (bushings included)


    Here are some installed pics.

    Front










    Rear







    Last edited by gk1; Yesterday at 07:26 PM.
    2015 S6 Quartz Gray
    Black, Carbon, Night, Cold, DA, ACC, VCDS lowered, 034 Trans mounts, EuroCode Alu-Kreuz, APR Stage I (91) & TCU, Rohana RF2 20x9, 11.660@114.83 (4615lbs.)
    2014 SQ5 Glacier White
    Black Nappa, Carbon, B&O, NAV, 21's, stock 13.527@102.11 (4615lbs.)

    2012 S4 S-Tronic Monsoon Gray, Stage II 12.868@107.8 (4275lbs.)
    2008 A6 3.2Q S-Line Daytona Gray
    2007 A4 2.0T S-Line Ice Silver
    2001 S4 Nogaro Blue, Stage I 14.746@95.29 (3944lbs.)

  13. #13
    Veteran Member Three Rings gk1's Avatar
    Join Date
    Aug 06 2014
    AZ Member #
    271504
    My Garage
    2014 SQ5
    Location
    NJ->CO

    Also here is some comparative spring rates I calculated but based on some assumptions since I do not know the wall thickness of the hollow bars and keeping the lengths all the same in the calculator it should only really be indicative of any difference for bar diameter and solid vs. hollow. Also no accounting for metallurgy differences...Anyway don't take this info as gospel...just for fun.
    Front bar spring rates:
    OEM 557 lbs/in
    Eurocode 878 lbs/in
    H&R 1284 lbs/in
    H&R hard setting 1604 lbs/in

    Rear bar spring rates:
    OEM 203 lbs/in
    Eurocode 431 lbs/in
    H&R 560 lbs/in
    034 393 lbs/in

    This give a stock Front/Rear ratio of 2.74:1, H&R is 2.29:1, and Eurocode comes in at 2.04:1 which may be what many people like most as it more rear biased.
    If you keep the stock front and add the 034 rear you'd be at a 1.42:1 which is the classic way of adding in oversteer but perhaps not what is best for the platform as many Eurocode users love their balanced setup and it looks like the H&R is a bit closer to stock bias. And if the Front H&R is set to hard it looks like it goes to 2.86:1 which is even more front biased than stock which may not be desirable either, but again these are not hard measured numbers and hardly scientific...just fun.
    2015 S6 Quartz Gray
    Black, Carbon, Night, Cold, DA, ACC, VCDS lowered, 034 Trans mounts, EuroCode Alu-Kreuz, APR Stage I (91) & TCU, Rohana RF2 20x9, 11.660@114.83 (4615lbs.)
    2014 SQ5 Glacier White
    Black Nappa, Carbon, B&O, NAV, 21's, stock 13.527@102.11 (4615lbs.)

    2012 S4 S-Tronic Monsoon Gray, Stage II 12.868@107.8 (4275lbs.)
    2008 A6 3.2Q S-Line Daytona Gray
    2007 A4 2.0T S-Line Ice Silver
    2001 S4 Nogaro Blue, Stage I 14.746@95.29 (3944lbs.)



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