I'd really like to firm up the brake peddal so I'm looking to get SS brake lines. My question is will doing just the fronts help without doing the rears?

-Rob

 

In theory, doing the front lines only will help, but may actually make the rear lines expand more than they would normally since they are now the most compliant part of the system. If you are doing the fronts anyway and have to bleed the system, it makes sense to do the rear at the same time if the old budget can accomodate it. If you are chaging the lines, its also a good idea to upgrade the pads at the same time to further improve the pedal feel by having more bite at the pad level.