my car's about 15 years old now, been taken well care of, used by my grandpa only 60k miles. im going to upgrade the sound system, not too much, just 1 sub, 2 amps, comps and a deck.
should i upgrade the battery while im already under the hood, or do i not need a new battery at all? everything seems to run fine, but it doesnt bother me to spend a little extra money on a new battery.
also suggestions for batteries would be nice too, i was hearing good things about optima yellow and red
edit: its a 1990 acura integra rs, 2dr