For Magnum Force 2" dropped spindles part number MFR 192000. FNSL6R BB Front Brake Kits (Hub) Description FNSL6R billet Forged six-piston calipers with 12.88" dia. 1.1" thick GT 48 Curved Vane rotors for braking power and style in this group of kits engineered for traditional non-ABS spindles on American muscle cars and vintage rods. Built exclusively for 17” and larger wheels, SL6 kits enhance tire and suspension upgrades on all types of custom show and high performance dual-purpose street and track machines. A full range of options for caliper finishes and rotor designs are guaranteed to catch the eye of the most discriminating enthusiast while providing optimized brake performance for every individual application. Note 1. Fits Magnum Force Drop Spindle only.. Installation Instructions