No idea. I didn't make the kit on that one and its not my car. Most likely the bumper extends further out than factory and Wald didn't come with anything to attach the factory one to? I'll suggest it to him, that's something I can make pretty easy.
I thought it was pretty low, but knowing the owner, he's pretty crazy when it comes to modifying his cars. He's going to install a front lift system to accommodate driveways, speed bumps and road reflectors.