i have a 99z28 with ground effects and 18x9.5 y2k rims on all 4 corners. will i have any problems with the kit. do you think it would be too low with the ground effects. will i need anything else so that this kit will work on my car. thanks
billy

 

I would buy new shocks. The stock ones will work but not as good as revalved.

 

yes there is a very real possibility you could bottom out at speed when being that low, you should get some new shocks, at least the revalves. You will probably also want some LCA relocation brkts and maybe a adj panhard rod. You can shorten your endlinks as well, but most don't do it.
Being that low w/ gfx will require you to be carefull, but nothing that should be to difficult if the streets are halfway decent, just hit inclines at an angle, be extremely wary of speedbumps and watch for potholes and what not and avoid them. You'll learn real quick.

 

I have a 99 Z28 with the GFX and i have a Pro-kit and its got a good stance, but its about as low as i need it around in my area, if i had a sportline i would have a hard time getting around w/o scraping and i have stock shocks, if you can get new shocks, get them.

 

Sportlines and GFX is gonna be really low, your gonna have to be really careful in almost every in-perfection in the rd.

I just order sportlines for my 2000 Z also, I'm waiting for my parts to come in though. I ordered: Sportline springs, Lower control arms, relocation brkts, adj panhard, and a STB.