So... twin DIN install. (NOT Double DIN) Is it possible?

[WolfWings]

First off: Co-phase doesn't turn your antenna into a Yagi. It's a mild tweak but it also reduces the power you waste broadcasting at passing airplanes. :-)

And I've found lots of crappy AM/FM/CB splitters, unless it's N-type input and seperate tuning screws for the N-type output and Motorola output, I won't touch em' for love nor money. I have no problem getting sub-1.3 tuning with a single 3' antenna from channel 1 through channel 40 on my CB through a FireStik AR-15 splitter, and it's wonderful reception for radio stations. :-)