I have the ground control kit on my matrix. I got the setup for free, and they used my car for the measurements. It allows for 2 3/4" max. drop in the front and 4" in the back. Looks great and handles great.
-aBySS Monotone Vibe-Auto Everything (I wanted a manual)-Moons and Tunes-No Badges-No Lateral Bars-Sony CDX-M730 Head Unit-200w PPI Amp Powering a 12" MTX Sub-9 1/2'' Stainless Steel Trumpet Air Horn-Spare Bridgestone Blizzaks Mounted on the Cheapest Steel Rims Ever