For FXSTS Springer Softail 1988-later and most custom Springers.Front brake caliper system kit (2 piston) for FL 4 speed 1972-later. Use with 10 inch flat rotor. These custom two piston front calipers with hanger brackets, spacers and mounting hardware are designed to easily replace the OE system giving your motorcycle that clean custom look with optimum stopping power. Features include