Has anyone tried running both the GT spec underbrace and the Tanabe underbrace together... is it possible? i believe they both use the same hole from all the pics i've seen... if they do, has anyone tried to machine them together?

 

It is possible but one thing you might want to worry is your exhaust and cat. I have the Labree HFC and it would not allow my Tanabe brace to fit . And if your exhaust it large or if it has an x-pipe, you may not fit the underbrace. I had an x-pipe on my exhaust and it is so close to my GT Spec. Any questions, please feel free to ask.

~Robert