if anyone has a spoiler, you can put the small XM antenna's under the spoiler and it works perfect. The antenna's will go through anything but metal. Just take the underside liner of the trunk lid off and there will be a gromet for the brake light wire of the spoiler. remove the gromet and take a pair of tin snips (metal shears). and make the hole bigger. put antenna through hole, will stay in place with the magnet on bottom. reinstall grommet in hole (yes the hole is bigger now but just do it) then silicon around gromet and hole. run wire through trunk lid and factory grommet that goes into car, reinstall panel and wala all done and no visible antenna. now that is the pimp SH@T

 

That sounds awesome. Do you have any pictures?

2004.5 DG/G 5AT Coupe with all options
Sidemarker turnsignal mod
GroundingGear™
2003 Yamaha YZF600R

 

i will take some and get them up asap