Hey Randy. There are not any pieces that will just plug into what you have, although you can use much of the factory wiring and upgrade the components to something that is much more flexable.
The alpine CDM series is a direct plug in to te factory wiring harness for the head unit. Although the factory setup uses a DIN style (cd changer type) cable that goes from the head unit to the factory amp sending both signal and power. You can easily cut off this end in the trunk) and splice in all new cables to supply the new amp.
If you plan to go back to stock, this cable can be easily replaced.
Once you supply power to the amp from this cable, you can splice into the cables that go to the speaker locations for a clean install. The only other cables you have to run is a set of RCAs from the head to the new amp. I opted for a 3 channel amp so I can power all 4 speakers and a sub.
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