Good ground from the stereo to the chassis is just the beginning. Make sure you have nice thick (no smaller than 8 gauge) ground from the battery to the chassis as well as the battery to the engine block. Having extras won't hurt either!

 

well i got the 2 10" in and a 100 watt amp and holy sh!* it pounds im going to get my plates and tags tomorrow and cant wait to cruise around and play with the stereo