maybe you;ll be able to help:
I want to order a brake line kit for my 2.0 Focus with brake swap for ST170 setup, but I'm not sure which one to get.

There is apparently no normal application guide and some kits are 4-pieces, some 6-pieces. Which one to take?

Also, what do these additional 2 brake lines are for?

thanks

 

4 hoses are for when you have rear drums, 6 are for rear disks, look at the black diamond hoses that are avaliable, 1/2 the price of goodridge, when you have rear disks there are 2 hoses each side

You can just make out the black diamond hoses i bought in the bottom of this pic

 

thanks, I verified this with my mechanic - if you had factory rear discs, you should go with 6-piece kit...