lowering a s197
 

I have an 05 gt with a eibach prokit,and aftermarket wheels.18x9 front and 18x10 in the back.Will this mess up my camber,and wair out my front tires. Any info would be great.

you'll need an alignment or you might just smear your tread all over the road. It will affect camber a bit which is NOT a bad thing. A little on a lowered car helps cornering grip and doesn't have to wear your tires faster... just differently.

In short.. get a professional alignment and don't trip. Enjoy your new better looking car.