I am planning to buy a new TL in the near future. I want to get it with the factory underbody spoiler kit. My question is how much ground clearance do you have after the underbody kit is installed? In my area they have some unusually high speedbumps and I want to make sure that the ground clearance was high enough so that I won't have to worry about that.

 

You should have alot of clearence unless you plan on dropping the car i have the Wings West body kit which is very similar to the factory kit and my TL is lowered and the only time i have problems is when going into gas stations and parking lots and drive ways that are steep but all i do is go slow and sideways and i rarely scrape but at stock height you shouldn't have any problems