I am fixing to put some lowering springs on my LT balt but first I had a few questions just so I can know for sure before buying

At the moment, everything on my balt is stock, its just a 2 LT with the 17" aluminum wheels..
I have been looking at the Ark GT-F springs:
http://www.arkspeedracing.com/05_ON_...f0402-0500.htm

and also the Eibach Pro Kit/Sportlines..

If I get the Ark GT-F springs (which are on sale now through here), will I need new struts/shocks?
And what about if i get the Pro kit/sportlines.. I'm almost positive I will for sportlines

I am looking to buy these within the next few days so any advice/answers will be appreciated

I would really like to keep my stock struts/shocks if possible!

 

i can't really comment on GT-F springs cause i never really looked into them when i bought my springs, but my car's an '07, i've only had sportlines for about a year and i'm still on my stock struts/shocks...