I've got a BMR right now and I need to have the crossmember redone so I can lower the car. I was just curious to see if the crossmember that I had seen before would allow me to lower the car without having to modify the trans tunnel to clear the torque arm.Not sure about the low profile model, I am aware of a short torque arm though... get in touch with "madman" (here @ YB) aka Brian at http://www.madmanandcoracing.com/. He is the go-to 4th gen suspension guru.
BMR, UMI and Spohn are other manufacturers of 4th gen suspension parts. I have installed components from all of these companies and they work quite well in the cars I've been involved with.