First, thanks for all the informative posts you've made on suspension as I have searched and read through a lot - including your summary sheet. I've also received a lot of great info from Tomasz.
I'm sold on coilovers and debating between Vogtlands and the Eibach Pro Street coilover. My understanding is the latter of the two isn't running on anyone's car right now. From a spec standpoint (as well as from the standpoint of the Pro-Kit you run), can you make a reasonable prediction on how it may handle? I'm looking for a setup that is going to be street compliant, aggressive in some spirited twisties, and could see the track < 1-3x per year.
Thanks in advance for any input available.

...My Pro Kit is LOW LOW LOW, but that really makes for a good alignment. With the Toe zero'd out, I'm running quite a bit of negative camber (guessing around -3 up front and -2.5 in the rear or thereabouts).

But, this kit was designed to work at this height, most kits understeer bad when lowered that much.

The Pro Street will likely have a more use-able range of height to get similar levels of performance.

At this point, I've not gotten confirmation from Pure Motorsport that the Vogtland is gas-charged. If it is, It's likely a total toss-up at this point. If the Vogtland is NOT gas-charged, I'd go for the Eibach Pro Street.

That's about all I can from my experience. But again, both should fit your spec's well for the 1k-ish price range.

Thanks, Ryan. I'll be sure to pass along info if I go the Eibach route.

http://www.gmpperformance.com/index.cfm?PG=detail_img_large&amp;IMG=5560<ul><li><a href="http://www.gmpperformance.com/index.cfm?PG=detail_img_large&amp;IMG=5560">http://www.gmpperformance.com/index.cfm?PG=detail_img_large&amp;IMG=5560</a</li></ul>

But that is just theory. Vogtlands could still handle better than Eibachs. I have the Vogtlands now on the Avant, and I like them quite a bit.

Montube design really helps when the shocks get hot - I have not driven the car enough.

...Vogtland may run some at low pressure, some at high pressure and some at ambient.

I want to know the exact pressure of a B5 S4 Vogtland kit.

Old Penskes I had were at 175, and I could not compress the shaft with me leaning on it. Vogtlands compressed with moderate two hands on the shock pushing against the ground. (Similiar to the original Ohlins)

...from compressing then just the can pressure.