I have 17 inch rims with a carbon fiber lip how much would u recomend loweing

 

depends on what car its on, sols look Mean slammed but if its on an EG, IMO they look good with a modest drop

 

yea and make sure your tires dont rub

 

well....if we're ignoring performance, and just guessing ride heights, then do this:

Measure from the bottom of your lip to the ground. Measure from your wheel well to the top of the tire.

See how much you're willing to drop it. easy.

You may or may not get performance and ride height. Those two are variable based on many OTHER variables. And you cant really solve something with more than 1 variable

 

I'd say about 1.5 inch at the most. Thats if you don't want to tear things up