Hello,
One of my friends have a 2008 etec engine.
As yours, 2 guages (lowrance), and a aerial.
This aerial is a LGC 3000 Lowrance, so now you have 2 aerial, but you need only one...
You can have a LCX 27 with or without aerial, if you want.
But if you don't say anything, your lcx 27 will come with an aerial.
You just have to find a friend wich will buy a lowrance without aerial, and you can sell your to him...
Antoine