^^^
i thought it was you that had test fit it..

 

the RE rx-7 diffuser WILL fit, i dont have any pictures but it will work. custom brackets are needed but its not that difficult, u can get the flexible steel from Ace hardware(metal strips with holes in it) and just bend them into shape.

 

im interested in this. someone try it out. dont you need to at least cut your rear bumper to allow air to pass through though or else wouldnt this mod result in negative gains?