FNSL6R billet Forged six-piston calipers with 13"-14" rotors deliver the ultimate combination for braking power and style in kits engineered for Wilwood's Pro Spindles and offer complete disc brake upgrade solutions for drop spindle applications on American muscle cars and vintage rods. Now with modified hubs for 5 x 4.50" and 5 x 5.00" bolt circle Wheels. 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.