coil-over, Ground control
A 2.5" ID 8" Hyperco spring is $49 each ...
Personally, I discarded the AFCO "hat" and bought a flatter hat from D & M Performance out of Dumas, Tx in order to get more shock travel. They are $9 each.
I realize it's half-assed and hair-brained ... but it certaily seems to be working on my race car ...
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Even that doesn't make sense.
The IAS is a shock/spring combo sold by Edelbrock and uses 600 springs.
http://www.ls1.com/forums/showthread.php?t=490996
Ground Control is a seperate company.
Eibach makes springs as well as other things, but you have to specify which of their many springs you are talking about and I assume you are refering to a shock that is valved to match one of those Eibach springs.
Boing boing boing

Seriously, do you mean you had the Prokit with stock springs?



