I am thinking of upgrading my battery to a high performance bat rather then a stock... if my engine didnt have a huge cover on it (see pic) I would get the big 3 done but I think it would be to much of a pain in the butt and cost a lot.

I was wondering if my Memphis amps can run at 16V or if it need to stick to a 12v?

Not my car but same engine...

__________________
2004 Chevy Epica
Pioneer DEH-7600
Morel 2-way front
Morel Coax Rear
Dual Kicker 12" L7's

Powered by:
Memphis 16 ST-3004
Memphis 16 ST-1500D
The Big 3 in 0 AWG
2 Farad Cap

Installed by:
Selective Sound