pelican says at this link...
http://www.pelicanparts.com/catalog/shopca..._pg3.htm#item12
"Old, worn out original brake lines are not only bad for performance, but are outright dangerous. Replace your worn out factory original lines with high quality replacement lines. Or for better durability and increased stiffness of braking, replace your original lines with stainless steel braided ones. These lines will not expand when pressure is applied because of the outer stainless steel sheath."
but at this link they say...
http://www.pelicanparts.com/techarticles/9...MW_calipers.htm
WARNING: Stainless lines are for "off-road use only" (i.e. for racing), and there have been instances the stainless steel braid can wear through the Teflon lining, some with catastrophic results (i.e. deaths).