The 034Motorsport 375mmx36mm 2-Piece Floating Front Brake Rotor Upgrade Kit for the B9/B9.5 Audi RS5 & 4M/4M.5 Q7/Q8 is a complete replacement brake rotor kit, designed to work flawlessly with the factory front calipers found on the B9/B9.5 Audi RS5 & 4M/4M.5 Q7/Q8. Weighing in at approximately 27.3lbs, each rotor reduces rotational weight by 0.4lbs on each corner over the factory 27.7lbs rotors. While reducing weight, the rotor retains proper thermal mass in the rings to adequately capture heat, while utilizing 72 directionally curved vanes to forcefully flow cool air through the rotor to dissipate heat.