Snif1 10+ year member
Junior Member
Ok, so I have never had a system big enough to need things like a high output alt, second battery, power cap at least till now, basically I read power caps are close to useless and of course the way to go would be high output alternator but as far as I know they don't make one for my car, I have also read that if I have 2 batteries they need to be matching and well I have a Red Top Optima up front and another WILL NOT FIT in the back, I plan to do the big 3 and add a secondary battery could someone give me some advice as to what battery to go with?