I want to get either skunk 2 or ground control coilovers which ones are better I want to put them on koni yellows so what do you think

 

There's been a lot of posts on Skunk and GC coilovers. Do a search to find more info. For the most part, ppl like GC's cuz you can order custom spring rates which can either offer a better ride or stiffer for better handling on the track. Skunk rates are set and most ppl think they're too stiff. I've personally had the skunks before and don't think they're too stiff. As long as you pair either of them up with a good set of shocks, then it'll be fine...and the koni yellows you've chosen are among the best choices. If you want custom spring rates, then GC's the only choice between the 2. If you're going with standard rates, either would be fine and I'd say get the one that you find cheaper. HTH.