The block uses a 12mm x 1.25 thread for the factory oil feed banjo bolt.
I had a hard time finding this info, or more importantly, where to buy just the fitting.
I ended up finding just the fitting for a fair price from Hahn Racecraft part # H TZ-8085 - Oil Fitting: 12mm x 1.25 to -4an
http://www.hahnracecraft.com/hahn/parts/install.htm
This info might be helpful to others in the future who put together their own kits.
Note that you may need to go down to -3AN for some turbos to prevent oil from going past the seals.
Turbo Oil Feed to Block Adapter
