Im changing out my head unit and my bose speakers for aftermarket ones but do i need to run speaker wire for the front or can i use the one thats there and how do i do it for the back.

 

are you replacing the entire system? (which I suggest you do). If you are and you don't plan on amping your speakers, then the stock wiring will do. If you do plan on amping them, I suggest running new wires. There was a night and day difference with my set up when I did

 

im not amping my interior speakers for now put the ones in the back dont have wires there because its the bose system and im put mtx thunder 8000 12,s in a rear well enclosure from subthump with an 801 d amp