I recently bought a whale tail for my 2004 LX through Car Id but it came from WingTech spoilers (wtspoilers.com.) I would not recommend going through Car Id. Go directly to Wing Tech if possilble. I am now waiting for a good day to get it installed.
I must say, this has been a tricky ordeal. First it has been difficult to find a nonOEM whale tail spoiler that looked like the $600 OEM spoiler with the light. I finally decided to try the one from Wing Tech for $306 with light and painted to code specs. This spoiler is extremely close in shape and size to OEM (like my 2006 LX) but it is not oem and does not install and fasten to lift gate the same way. That was the second tricky issue. The first auto place I talked to really was not comfortable at all installing it. The next guy I talked with is an auto body and collision guy. He seems very comfortable on how to install it after we had a good conversation about it. He was also highly recommended.
Hopefully I will see if everything comes to fruition satisfactorily this week.....and doesn't come off in the first carwash. The wing tech guy actually answered the phone when I called him and he swears it will not come off in a carwash. I will post back with my whale tail installation assessment.