TRD Springs usefull for European High Speed Autobahn driving?

Hi everyone,
Here my first post. I m from the Netherlands (Amsterdam Area). I drive a black 2010 Prius Dynamic. My first post is about the too smooth ride of my Prius: I used to drive more sporty cars but due to tax preferences I now drive a Prius. Nice car but it has not a nice spring/ shock combination at all......

Explanation:in the Netherlands and Germany we have the so called Autobahn: its a highspeed highway with NO speedlimits at al!! So you will understand my average speed is mostly above 140 km/h (sometimes just because I feel to drive fast but mostly just to not be an dangerous obstacle for the fast BMW's Audi's and Porsches...they fly-by with speeds up to 230 km/h).
The problem is that the Prius can drive these speeds (140km/h) easily but it is very wobly at these speeds (and with a little wind from the side its not nice to drive at all) even with 215/45/17 tires. So I m going to lower the car. As I think now, with TRD springs.
It seems in the US you have a lot more OEM Prius tuning parts. Like the TRD springs etc. In Europe the dealer can't deliver those components so I'm going to try to order those parts in het US and get them shipped to Europe. Maybe Camelback can help me. Camelback, do you ship to Europe?
But before I order the Trd Parts,I have some questions, maybe one of you out there knows the answer.
1) I see they sell TRD springs (PTR0747100) : But how is the ride? Stable enough? And is TRD a relabled Eibach spring?
2) They sell also a rear swaybar kit (PTR 11-47010) . Can anyone tell me if you can feel the difference with a swaybar when you drive high speed in a straight line? My opinion is that a swaybar makes a difference but only when you're drive on the edge (on a track). In other words: would a swaybar be usefull for European highspeed, straight forward driving conditions or can I do without them?
Hope anyone could help me.
Greetings from The Netherlands

 

Thank you xpcman!
I didn't know about the cross-member thing.
I'm going to check this out.

 

Hi Tony D,

I know about H&R but I thought maybe the TRD's are better because they 're original Toyota parts.
My previous cars had Eibach springs: also great.
I m going to get information about the cross members.
Thanks

 

Reading all your replys and treats about springs and braces to improve the ride learns it is not easy to choose between al available products. I think its no good for Toyota to create such a great car with such bad stability...... Toyota can learn a lot from other marks I think. My car before the Prius was a Volvo V 50, its ride was almost perfect, but quality was not good.

 

I ve installed the Rude person's front and mid braces and the car is much more stable and much less torsion in the carbody.At the same time I also installed H&R lowering spings so I can t really tell which modification causes which part of the better handling.I prefered the trd springs but those are not available here in the Netherlands, so H&R is what i bought. The alignment after installing was easy. Only 1 number on each frontwheel was out of spec. They corrected this. All other numbers were still correct. Good job. I.m.o. the car is a little too low at the front and a little too high at the back. I think Eibachs are more comfy. The ride is firm and stable. Now i can drive easily 140 km/h and cross winds don t have as much impact. But surrely its still not a audi or volvo. The lowered prius looks great. Speed bumps are my new mortal enemy....and so is road damage...H&R is pretty rough.....and I m used too lowered cars...Imo eibach would be more comfy
The back of the car is still a little loose. I think a swaybar from trd would be usefull...but again this is not available in Europe.
Last week a did a highspeed test on the German autobahn, 180 km/h and i still notice the prius is not made for this at all. At 140 km/h it feels okay, higher speeds the prius doesnt like....so sometimes i miss my Volvo I had before. At least I ve installed the Valenti led taillights. That looks great but there s no rear foglight in it...which we have to have in Europe, so now i will have a problem with the annual-government-carcheck.......damn. I will mount a loose led foglight behind the rear window beneath the trunkspoiler.
For so far my prius looks better, drives better, i m happy unless it is still not 100% perfect.

 

I ll post some pics later. It s supposed to lower 30mm in the front and 30mm at the back. But after installing it more like 40mm front and 30mm rear.

 

Pic with the biggest gap is the rear. Pic with the smallest gap is the front.

 

Another pic from the side

 

Today I saw a set 19inch AZEV P Classico, beautifull rims. 5x100 8,5 et 30-45 (choice), look at azev.de. They look like the plus performance rims but in 19 inch!!!I really really like those wheels, but I think I ve spentvenough money on my car......this year ;-)))))
So maybe another priuschat member loves them too.
Does anyone know if these do fit?