These spindle mount kits include floating rotors, billet aluminum 2 piston calipers with linings, mounting brackets, and all necessary hardware. MW spindles must be sent to our machine shop for mounting tabs to be installed (p/n 31250). Alternatively, you may purchase new spindles that already have mounting tabs installed (p/n 31255L & 31255R). Installation - Service instructions can be found on Service Bulletin #0086 and #0080.