Suspension Question

[Obsidian]

So I recently purchased the Koni FSD/Eibach lowering kit. Well I just received it in the mail today and to my surprise it isn't what I ordered. The model designation 2150-4002-1 for the 2.0t Sedan, however I received the model 2150-4002-3 which is designated for the wagon. So my question... is there a difference? The parts look identical from what I can tell and I am assuming the last number listed on the part is strictly for ordering purposes and has nothing to do with the actual parts. Can anyone confirm? I just don't want to get the car torn down and find out some same variance in parts is going to impede my install. I already gave Koni a call but the offices are already closed for the day. Any insight would be greatly appreciated.


Thanks in advance!

[z_wrecker]

If I had to guess I would say spring rate for the rear springs might be different. However I have 0 experience with it.

[b7_Andy]

I'm 99% sure the sedan and avant suspension are the same... But wait for someone else to chime in to confirm that.

[Obsidian]

I'm 99% sure the sedan and avant suspension are the same... But wait for someone else to chime in to confirm that.

Thats what I thought too, but Im no expert. I checked out Koni's website and I cant seem to find any technical data regarding the spring rates. Even when I check on the separate products they take you to the same generic product details regarding the FSD.

[b7_Andy]

Ya I've found that a lot of suspension companies don't like to show springs rates. I just know that when I look up coilovers they all say that they fit either sedan or avant. Even searching on Audi's genuine parts website almost all sedan and wagon parts are the same. Lets just say that there is a chance the avant springs have a slightly stiffer rear spring rate... Most guys here complain about their rear springs being too soft anyway so I would rather have slightly stiffer springs in the rear. But I'm pretty sure the sedan and avant suspension is identical.

[Obsidian]

Ya I've found that a lot of suspension companies don't like to show springs rates. I just know that when I look up coilovers they all say that they fit either sedan or avant. Even searching on Audi's genuine parts website almost all sedan and wagon parts are the same. Lets just say that there is a chance the avant springs have a slightly stiffer rear spring rate... Most guys here complain about their rear springs being too soft anyway so I would rather have slightly stiffer springs in the rear. But I'm pretty sure the sedan and avant suspension is identical.

Anyone else have any idea?

[Okedokey]

The weight in the back might be more. All companies have different versions for avant and sedan. I would contact your supplier and check.

[shahk62]

Rear springs are different to take into account different weight balance of avant


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[Ringsby4]

Vogtlands are one and the same but others,ST for eg do have a different setup for sedan and avant,I talked to ST and they indirectly told me the spring rate was different for the avant ....but they wouldn't elaborate which was annoying as I might have chosen the avant over the sedan if I only knew what the actual rate was,I eventually went with VL and I'm more than happy

[Obsidian]

Well guys I got some confirmation. Koni advised that the struts are exactly the same but were pretty sure the spring rates were different. So I contact Eibach directly and sure enough they were. The Eibach rep advised that the spring rate in the rear were stiffer to account for the additional weight in the rear of the Avant. He said instead of dropping it 1.25-1.5 all around, the rear would only drop about an inch, so it would have a raked look. Otherwise from a performance standpoint they would perform exactly the same. So I opted to contact the supplier and get the correct set shipped out. Just an FYI if anyone ever runs into this issue or is curious. Thanks for all the input though!

[Obsidian]

So the Koni FSD/Eibach kit is apparently back ordered until 6/3/16. So I think I'm going to go a different route. I still want something comfortable so I was looking between the Billstein Touring and the Billstein HD. Can anyone speak to this for me? I looked around and there isn't much out there regarding the Touring model. Will they hold up with the Eibach springs on them? Comfortable? Or should I just go with the HD? I did also find a good deal on the ST X coilovers... would I be disappointed with the ride comfort by going with these? Its my daily so comfort outweighs performance for me on this one. Thanks!

[67Twisty]

So the Koni FSD/Eibach kit is apparently back ordered until 6/3/16. So I think I'm going to go a different route. I still want something comfortable so I was looking between the Billstein Touring and the Billstein HD. Can anyone speak to this for me? I looked around and there isn't much out there regarding the Touring model. Will they hold up with the Eibach springs on them? Comfortable? Or should I just go with the HD? I did also find a good deal on the ST X coilovers... would I be disappointed with the ride comfort by going with these? Its my daily so comfort outweighs performance for me on this one. Thanks!

Don't go with the touring Bilsteins with the Eibachs. They are designed to work with stock ride-height, non-sport springs. The HDs and sports have the same valving, but the perches on the sports are designed to work with lowering springs. The HDs have a longer shock body and piston and won't provide the proper suspension travel with these springs. I haven't driven a car with the FSDs, but I purchased an Eibach pro kit and Koni yellows separately and installed them on my Avant. I like the ride and handling a lot. Similar to the Audi sport springs/dampers but a bit lower. The only downside for me is the shocks/struts have to be adjusted off the car. My advice is get the Bilstein Sports or Koni yellows if you want to use these springs.

[Obsidian]

Don't go with the touring Bilsteins with the Eibachs. They are designed to work with stock ride-height, non-sport springs. The HDs and sports have the same valving, but the perches on the sports are designed to work with lowering springs. The HDs have a longer shock body and piston and won't provide the proper suspension travel with these springs. I haven't driven a car with the FSDs, but I purchased an Eibach pro kit and Koni yellows separately and installed them on my Avant. I like the ride and handling a lot. Similar to the Audi sport springs/dampers but a bit lower. The only downside for me is the shocks/struts have to be adjusted off the car. My advice is get the Bilstein Sports or Koni yellows if you want to use these springs.

So between the Billstein Sport and Koni Yellow which is going to have the softer ride with the Eibach springs?

[67Twisty]

Probably the Koni yellows.

The Eibach springs are a bit softer than H&R but I think that makes them a good daily road option. I think they pair best with the Koni yellow even though Eiback only offered the kit with the FSDs. There's a lot of fans of that kit, but also many who claim the FSDs don't recover well from large dips or bumps without wallowing. Our cars are heavy to begin with so I dialed my fronts in at 75% stiff and the rears around 40%. This worked well for me so I left them at these levels. The rears are easy to pop off and adjust but the fronts aren't, so getting it right the first time helps.

I think the Bilstein Sports are often paired with H&R springs which are stiffer than Eibachs so maybe that's part of the reason they're viewed as stiffer. Still great shocks/struts so I don't think you'd go wrong choosing them. You'll find good reviews on both.