First you need to check a couple of things. Look at the condition of your stock battery. Check the connections and the battery wires. Make sure all the grounds are good on the block and tranny. Also have the alternator tested. And yes they have up grades for your car. Look into doing the big three. This will help out alot. Adding a second battery is not hard but won't do anything if there is something else wrong. It will only make things worse.