For the same reason aircraft manufacturers and race car builders do. Stainless Steel Braided Brake hose is far superior to rubber brake hose because rubber hose expands under pressure. Sort of like when you turn your garden hose on and you can see the hose expanding as the water pressure in the garden hose increases. Stainless Steel Braided hoses don't expand under pressure giving you a more firm, faster responsive brake pedal. Also, these hoses comply with U.S.A. Federal Motor Vehicle Safety Standards. Most other brands don't comply.
Direct replacement of factory hoses with no secondary adapter fitting required.
*Quality Stainless Steel Braided Hose
*Harder Brake Pedal
*Shorter Stopping Distance
*Clips and Washers
*FMVSS 106 D.O.T. Specified
Z06 use part #196115