Yes, Garrett built a T5. Huge great thing, size of a planet and doesn't even start to spin until something like 4500rpm. Strictly for racing cars, although Power Engineering put one on a Greek guy's road car years back. I went in it when it only running about 380bhp and it shit the life out of me (2.4 block, Grp A head etc etc). Was running well over 500 brake when it was done.