If you install the antenna on the roof, install in the middle not the side near the rails. Reception will be better.

You will need to fish the antenna wires thru some small holes in tight spaces. Be patient, take your time, and use some kind of fishing helpers (hangers, fish tape, etc...).

Enjoy! It's a great mod!

__________________
-----

-'13 E93 M3 Cab, Interlagos Blue, Carbon Black leather, DCT, all options, and fun, endless fun!
-'13 X5 35i M-Sport, Carbon Black & Cinnamon, Dinan Stage 2!
-'15 Toyota Sienna Limited Premium AWD, Silver & Grey, Nav & BluRay, and less lame than the 2011 it replaced
-'07 Mini Cab S, Laser Blue, 6sp, endless fun that ended (sold)
-'04 X5 4.4i, loaded, loved, modded and sold