I'm pretty sure they are 3/8" as T3's and T4's use the same bolt size but if they aren't, it's aluminum so it's quite easy to enlarge them.
Thanks. Placed the order. Looking at the installation instructions it isn't clear if the turbo support brace needs to be removed to install the block side. Does it? If so, does the brace fit after installing the new drain line? Thanks.
It makes it WAY easier to install (especially since the stock fitting in the block is typically stuck and you need clearance to get a big wrench on it). If you install the line properly it should clear the brace just barely.
Yes, but going to the pan is easier and better since the drain is gravity feed and the additional drop allows for better draining and easier oil line fitment. Just make sure the drain location in the pan is above the top of the oil sitting in the pan.