Hello bruce.
The bottom of the PTE FM does not extend past the bottom of the radiator support, and mounts to the existing holes that are used for the factory X-braces. Really easy to install, and the pipes closely hug the lower radiator support. Depending on how low the car is, and how much suspension travel you'd have over large bumps, or at full travel would be the real question. I'd say, as long as the bottom of the air dams aren't touching the ground, and you have a little clearance there, you should be ok.
Hope some of this helps a little.
Patrick