Stoptech 309x32mm Replacement Brake Rotor

Performance Rotor Rings 309mm x 32mm (12.17" x 1.26") - P.C.D. 177.8mm Replacement for: StopTech C43 CBK brake kits Hardware INCLUDED Paragon Performance Rotor Ring offers superior braking and cooling efficiency optimized for track and race applications. It features directional ventilation vanes to create suction, turbulence, and guides cool air through the rotor for improved heat dissipation and increased resistance to cracking under harsh track condition. Made of CM-250 special formulated high carbon alloy cast iron, it allows for an optimal bite, thermal characteristics, high-temperature strength and durability. Rotor rings are heat treated to release stress in the rotor to avoid deformation and vibration then turned by state-of-the-art CBN surface machining to ensure better break-in with new brake pads. Vibration is reduced as the rotor lateral run-out is kept within 0.03mm and well-balanced: variations are kept within 2 grams. All rotor rings went through rigorous quality control procedures and inspections to ensure the rotor rings are fit for their purposes. The floating 2-piece design allows thermal expansion of the rotor while minimizing deformation and ensuring the rotor is self-centered with the pads. A slotted rotor improves braking consistency by maintaining a clean contact surface and dissipate heat generated and gases released when the pads come into contact with the rotors. Slotted rotors have a superior advantage over blank rotors in wet or raining conditions by preventing water films to form between the brake pad and rotor surface. Weighing less than most O.E. rotors while maintaining proper thermal capacity, our rotors improves overall handling by saving unsprung mass.   Directional ventilation vanes for optimal cooling performance and increased resistance to cracking. Run up to 30% cooler than O.E. rotors and increase cooling efficiency by up to 30% Floating 2-piece design Minimizing brake fade & judder during extended sessions   Includes: One pair Paragon Performance Rotor Ring (LH & RH) Detailed installation manual   Replacement of: 28.001.1110, 28.001.1118.CT.99, 28.001.1118.CT.87 (StopTech C43 CBK brake kits) Specifications: Outside Diameter "A": 309mm Thickness "B": 32mm P.C.D. "M": 177.8mm Number of Mounting: 8 Size of Mounting: 8.1x 10.25mm Type of Mounting: Oval Internal Diameter "C": 216mm Inside Flange Diameter "D": 162mm Mtg. Flange Thickness "H": 8m       Part Number: PRR.8009.355.2500.320.23300.08.01.L/R   Extra/replacement hardware is available for purchase. We recommend using new hardware when replacing rotors to ensure the rotor ring is attached to the aluminum hat properly. Please refer to our Rotor Assembly Instructions for torque specs and detailed instructions. SKU: PRR.8009.355.2500.320.23300.08.01.L/R