Line to driver side turbo. I replaced both lines to that turbo as they were brittle to touch. Caution as male part with o-ring may break off inside block. Not to worry what i found to work for me since i had it was piece of wire hanger with one side bent like an L and the L part of the hanger inside the broken piece in block and carefully pry towards the radiator and a lil wd40 to lube oring and popped right out. NOTICE THE ONE MOUNTING HOLE FOR EACH LINES. Otherd may habe 2 holed