Hub mount. Offers drastically improved braking performance and looks over stock. It is a simple bolt-on installation, but will work in combination with 18" or larger wheels only. The brake disc is made of 420 stainless steel and is drilled for optimum performance and heat dispersion. The inner carrier is manufactured from 6061 billet aluminum with a black anodized finish for lasting good looks. Kit includes one brake disc and one billet brake caliper adapter bracket, to compensate for rotor diameter so the stock caliper can be re-used, and all required installation hardware. The brake line is also re-used. Compatible with stock or aftermarket fenders. Mount style 'B'. Counter bored 3.25". 3.25" BCD, hole to hole distance 48.6mm. Counter bored mount holes. 56.3mm ID.