2003 Limited 4Runner w/ JBL system original.
I replaced the speakers, sub, and head unit. Added a sub amp, and am still using factory amp and speaker wire.
Here's my stuff:
Fronts - Kicker 43CSS694
Rears - Kicker 43 CSC674
Sub - Kicker CompR 8" shallow mount
Sub Amp - JL Audio JX250-1...