i know i need hardend bolts of some sort for my turbo/manifold but i dont know what sizes they are.. what size bolts are used on precision sc61 5 bolt housings as well as inlinepro A/C manifold ( where the turbo connects to the manifold)

 

from the FAQ
https://honda-tech.com/forums/forced-induction-16/almost-everything-you-wanted-know-about-turbo-install-bolt-sizes-thread-pitch-oil-feed-373905/

Drag, Rev-Hard, Inline Pro - 10mm x 1.25 [30mm] ( length of the bolt)

i would reccommend studs with lock washers and nuts as the best way to attach the turbo to an inlinepro mani