Depends on the power you are sending to your speakers. My general rule of thumb is if it is less than 50watts RMS (real power from a real amp, not deck watts) then the factory wiring is fine.

Upgrading rarely hurts but it doesn't always add anything.

__________________
Paul Niwranski
1966 Cadillac Superior Crown Royale Limousine Hearse

If you're mirrors ain't shakin...you got taken...
RIP Member #8
Be careful what you wish for...