Ground Kit

i have a home made one on my box.. made it out of 4 gauge wire and ground connectors .. i noticed allot of change.. brighter lights... steady idle...my sound system is louder.. you should try it out.. you can make it or buy it either way you are making a good decision.. as for grounding points i actually rigged up the positive of a led to my battery and just tried out allot of size ten bolts in my engine bay to see if it was a good ground.. if the led lit up i connected it there.. hope this helps