Cutting springs.....
 

Is this a bad idea? I know ot isn't the best way to lower a new car, but I need to lower my 99 Z. Since I put my 18" Wheels on it, it looks to high.

really not a good idea

Phantom is right.

I lowered mine by cutting 1.5 coils off the front and only 1 coil from the rear.The ride is no different that with a set of eibachs.
BUTthe reason is plain and simple....If you have to ask about it then chances are you wont have a clue and mess up your car or get seriously hurt.
If you go lower than 1.5 coils on the front it will ride like crap.
If you decide to heat the coils it will ride like crap.
The only reason I done mine is because I am an experienced mechanic and also have a spare set of coils in case I dont like the ride.If you have never taken the front suspension completely apart before then I wouldnt sugest trying it.
JMHO.

Later
Mike

i agree that it is not a good idea but i did it anyway. i heated the front and cut 1 coil off the back. i t looks great and does not ride like crap. i was very scared to do it but it turned out good and never had any problems with it.

I cut mine...
No problems, good sporty ride...
It is a little bit of an advanced project though. If you are comfortable turning a wrench, have tools, and a little mechanical aptitude you can do it with only one extra step over the installation of aftermarket springs. (the extra step is the cutting of the spring)
I have to disagree with a previous post, NEVER heat a spring. Cutting must be done with an abrasive wheel on a power tool. A hand saw will never get it and a torch will ruin the spring.
I have a couple of tips on my website that I picked up doing my lowering job. I learned as I went and made a couple mistakes, I have put the high points down in the site, but it is still under construction so not totally complete.
Good luck
Dave