Yes, just using a harness adapter puts you right back to "OEM" hookup. The option to break out the rear subs to the rear channel of your new head unit is there too. You have to seperate out the wires at the sub and pull a new pair up to you head unit. There is a write up on it here. Kinda on my list of things to do, along with moving my bass cannon to the RCA plugs on the back of my stereo (separate bass outputs on it)