I have the spring now, get some pics of them and install, specs and all wed when installed, they off a 02 CTS, so updated

I think you're missing the point. If they're off a Mack Truck, we still wouldn't know jack about them.

And I wouldn't put them on my car until I did. Honda Prelude springs might be better for your setup than those. Every spring package is calculated for the chassis it'* going into. And for different reasons.

This is a mer experiment and I have seen some of other kinda of things like this wed is when me and the techs helping me from my work are helping me.So not going on per say but The GM tech and my work know what is going on and are not sure will fit or not, we are just going brain storm, so point is trial fit and see....... I love this site for information but people can also do some good old trail and error. and like it that way,

On a 2000+ maybe but I can't see them fitting on a re 00 and I would recommend sts springs Not CTS. But I still can not see STS springs fitting on a pre 00

Completely different chasiss on your car than those springs are designed for. You need a firm grasp of suspension design before you just swap parts from random cars. 00+ guys were looking at STS stuff for their setup IIRC< but you grabbed CTS stuff for a 92-99? They weren't even designed on the same continent... Hell that'* a Lighter. RWD car with an aluminum engine, spring rates, an f/r balance will be NOTHING like your 3500lb FWD Iron V6 car...

GM techs don't do anything like this either. I'd try to return them before you use them and can't.

The springs are not even freaking close....... I should have listen, I have a buyer for them not moeny lost except shipping, $15.99.......But I am happy to know

good old trial and error

do they do custom completely as far as spring rate and all that[/quote]

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Yes.

and they will make it for my car? lol too manyt questions huh