Man, I wish I had seen this before putting in my IS38. I broke mine and barely made it to the VW dealership before they closed for the weekend.
Also, just to reiterate the need for these, the m8 Triple Squares need to be SHORT and NARROW!
I recommend these, even though they're a hair expensive. I ended up borrowing one from a friend after several HOURS of trying to get my normal sized 3/8" triple squares to work.
The oil return line M8 triple square needs to be NARROW and/or SUPER LONG to get past the wastegate rod. A 3/8" ratchet triple square won't work.
The coolant line M8 triple square on the front of the turbo needs to be SHORT to fit between the turbo and the exhaust inlet manifold.
So, the ones I bought should be a hair smaller than that even, at least the M8 one. The ones linked in my post, up the M8 says it's 0.76", which is 19.3mm. Those are listed at 19.5mm. So literally a hair smaller lol.