yes you can
i just replaced mine there were 8 total (2 on each end of each line)(2001 cvpi)
the hard part is finding the O rings

i went to Napa and they didnt have the right ones i bought one that was close but it didnt work it was too thick and prevent the line to slide in

i went to a local gasket company who told me they were metric and refered me to a local small shop that i had no idea existed which sold me the right O rings

in order to get the right ones the shop should measure them with calipers and or measure the line that the O rings go on
2008 mercury grand marquis ls