cant find any markings of the AR on the turbine.

 

See if Garret/Airesearch can tell you....They'll know for sure.

 

I have a TO4b25 that has .60 cold 1.15 hot. It came off an international Diesel.
I am modifying two of these in my twin turbo setup for my 5.4 Ford.
The split tang can be modified if desire where only one half of the a/r is used= like in my example a 1.15 a/r = a . 57 a/r
Here is a link.

http://www.turbomustangs.com/smf/ind...;topicseen#new

This may be of help

Rus

 

way to bring back a 2 year old thread