Spooney
10+ year member
CarAudio.com Veteran
I would stay at the exact same capacitance if i were going to replace that cap. Going lower would definitely be a no no and going higher might not do anything but it could make your amp do funny things too. Going higher than the rated voltage would be fine though. Any cap rated for the same voltage or higher with the same capacitance should do just fine. I'd recommend replacing any caps in parallel with that one as well. Also make sure you clean all of the electrolyte up that came out of that cap(the liquid) as it will start to corrode anything it might come into contact with if you leave it. I would use acetone( find it near the nail polish in any store). Acetone will work great for cleaning the solder contacts before and after soldering as well.
