so for an off the shelf M12 x 1.75 coper washer seal to 1/8"NPT there are two options brass or AL
brass lots of reviews the piece is junk, breaks, etc.
comes with instructions not to exceed 25ft lbs. i set my torq wrench to 20ft lbs. immediately snaps at like 1/3 of that lol
no options and my lathe i guess doesnt do metric threading
going to try making what i need out of a bolt i guess
https://www.amazon.com/dp/B000CIJ39O?psc=1&ref=ppx_yo2ov_dt_b_product_details
dug though my metric bolt bucket and found a M12x1.75 bolt, stuck it in the lathe and made what i needed. steel should hold way better.
header wrapped and installed with turbo. oil feed and drain lines, O2 bung, oil pressure gage tap isntalled.
working on sourcing braided AN3 brake line parts to make all lines since it gets a little tricky and annoying doing it how i would normaly do with off the shelf hoses.