FC3S 86-91 SS Brake Lines (4 piston calipers)This is the same brake line kit we use in our #26 Time Attack RX 7. This is a must for any track driven RX 7. Get rid of that spongy brake pedal with our ss brake line kit. Unlike the factory rubber lines, our ss lines do not expand under higher pressures or deteriorate with age. Lucky 7 Racing brake lines are coated to protect the ss material and are also DOT approved and 100% street legal unlike some other kits out there.