say geddy how much did it cost to install em?
Nothing

It helps when you have "people." :th_mischievious:
Seriously though, you can do it yourself if you have the time. The only real trick is getting the springs to compress to install on the struts, but you can rent a spring compressor from AutoStoned or ORielly's to help do the trick. OR if you know someone at an automotive shop, you can bribe them with a case of beer or something to compress and set them up for ya. That is what I did when I had my first set of KYB GR-2's with the SSC Gen II Springs.
A couple of things to keep in mind when doing this.
1. Buy NEW strut mounts. Sure you can use the old ones, but why take a chance on something that has been on your car XXXX amount of miles. Also its good to keep your old springs intact and stored some place incase you sell your car, you can make some money back by swapping out the new ones back to the old ones if you get rid of your car. You can get generic mounts from TireRack by KYB for around $50-75 bucks and I know ZZP has some good ones that cost a tab bit more, but they include all the necessary rings and the metal boot cover for the front strut mounts. I think their whole setup for all 4 is roughly $100 bucks.
2. You will need to get the upper and lower insulators that rest against the struts and inbetween the springs themselves. The best place to find these would be through either Rock Auto or a dealership. The only problem with a dealership is that they are gonna charge you through the nose for them. That was my mistake my first time around when I made my first set of struts. Going through Rock Auto will save you easily $20-40 bucks on the cost of them. If you need the part numbers for the insulators I can get them for ya as well. I know Rock's part numbering system does not match up with GM's part numbering system unforuately. But I know which ones they are on the Rock Auto site if you need help.
3. Best bet is to also get the KYB boots from Tire Rack. I did that for my first set and this set as well. The new KYB boot package comes with the Bumpers included, that saves you a ton of cash, and the rears also come with the metal cap that goes over the boot at the top of the strut. If memory serves, the whole package of 2 front boots, and 2 rear boots from TireRack ran me about $50 bucks. If you need part numbers let me know, I can look them up on the boxes for ya.
4. Get a set of 4 antipogo washers from ZZP. You will be lost if you dont. They run about $25 bucks for a set of 4.
5. It is best to go ahead and get 2 sets (4 total one for each wheel) camber bolts. You will need them once the car is setup with the new struts. Your alignment will definitely be out! I drove for about a week without a good alignment to allow the new springs to settle before I went to NTB and then had them do a proper alignment. For 2 sets of camber bolts, you are looking at about $40 to $50 bucks roughly. You can find them cheaper, but dont skimp on these, they are a much needed part to the whole lowering thing. I got mine from PFYC.
6. Me personally I went with the 3 year alignment plan from NTB. That way I could make changes and never have to worry about paying for another alignment for 3 years. That cost me about $120 bucks.