some shops do recommend upgrading the alt if you decide to push 1k+ watts. one shop only recommended getting a yellow top battery for my car for whatever reason. ive talked to a few people and they say its not good to put a lot of stress on a stock electrical system...dont get me wrong here, im not going to push 50000watts or anything, just wanna be careful with my baby...digitalgm said:This thread really doesnt make that much sense to me. Upgrade electrical system or run a new battery?!?!? You realize that your stereo is only feeding off of the battery when the car is OFF. So, you could do both or either. Upgrading the electrical system (new alt) is going to give you more power to push while the car is ON and thats IT. Will take away a couple hp but no biggie.