I need to put my ebrake system back together since switching from drums to discs, problem is when i finally found the cables, at pep boys they have 2 different sizes, now these cables have been hard to track down, so i would love to get them asap, problem is they have 2 different sizes listed, both are 14MM and i believe one is like 14.1 and 14.8. Does this make a difference? i have the exact sized on my desk at work, the guy there had no clue and i cant seem to find out anywhere, Would it really matter the size i put on? i just dont want to go ordering the wrong part.

I have a 91. RS with an 87 Formula 9 bolt rear, if that matters.

 

Are you using the stock style iron caliper rear discs on the 9 bolt? If so you'll have issues with the install. There are no bolt in cables that will work with the 1991/1987 combo you are running.

Ed