Performance Machine Speedstar Race Weight Full-Floating Brake Rotors are CNC precision machined to ensure a flat and parallel surface. Hardening the 420 stainless steel outer band to meet RC36 specifications, coupled with a full-floating design yields a rotor with a higher resistance to deformation. The wave cut braking surface is drilled in a sweep pattern for optimal heat dissipation with a reduction in weight. The inner carrier utilizes the increased strength of 7075-T6 aluminum for a lighter weight design while improving braking performance. The laser engraved PM logo on the floating elements will let everyone know you are serious about performance. Designed for use with most OEM and aftermarket wheels and calipers.