Amp size, antenna or antennas, whether you are running stock alternator, AC or DC class, you about have to go to one to really see what all is being done some comps have different rules. There are just too many things to list. May I ask are you really interested in this as it can turn into a money pot!!! Guys spend big bucks on these systems and a lot of time as well. Just a heads up. IMO, I would look around your area and find out where the next comp will be and go check it out for yourself. JMO. Might even get some great info from there as well. Also check out Dave Made amps website, there may be some info on there as to where the next good comp will be or if one will be near you. Good luck with you endeavor and god bless.