2008 radio in 2007 ram
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Welcome to the forum. Yes, any radio that works in the '06-08 RAMs are interchangeable. Keep in mind however, that some of the options are not part of the radio, but a separate module. Sat radio has its own module, as does bluetooth and a few others. If you're talking about the integrated iPod connector (with the actual iPod cable, not just the AUX in), it is also a separate module. I think it's mounted near the glovebox.