hey, i just bought a new head unit and speakers, i bought a Boss Audio 634U headunit, 6 and a halfs, 6X9's, and a 12 sub with an amp, i was wondering what kind of wires and harnesses i will need to set it all up, any help would be appreciated. thanks

 

almost forgot, i have the stock cd player and the stock cassete player, what should i do with the cd player? should i leave it in?

 

if youve got a mazda 3 u need a 2 piece dash kit, wiring harness, and if u wanna keep steering wheel controls u need a to get ann adaptor for that if you go to crutchfield.com u can get all that for about 100 cause the steering wheel adaptor is between 40-70 bucks