Has any ever tried these out? (picture of them can be seen here)

I think that they're more popular with the subaru's (STi makes them), and I want to say that it's gotten good feedback from that crowd in terms of steering response and an overall tighter feel. But has anyone tried it out on an Evo? I ran a search but didn't find anything substantial.

 

The only thing ,on the evo at the upper side there is no bolts too bolt that unit on . Unless its just for the door bolts . Do they want you too put in some nut inserts that would allow the side part too bolt in . I know other cars sometimes have that extra hole with a theard in it too use something like this , But the EVO ?