TCI transbrake turbo 400
4 years of street driving and numerous 9.0 @ 150 passes in a 3800 pound car and never had an issue.
Still probably wasn't worth the grand, but it was in the car when I bought it and definitely can't complain.
Never would have guessed it would have lived under the stress I put it through.
Someone once told me you could build a turbo 400 in a sandbox and make it live?
I would think TCI is hit or miss on their quality, plus something to be said for no core charges if you don't have a donor trans.