[PRECISION BALANCED] - All QuietCast rotors are factory mill precision balanced, which disperses the weight evenly, and allows for smooth, safe stops with no pedal pulsation [ENHANCED PERFORMANCE] - Superb performance ensured by OEM style vane configuration that provides more efficient heat dissipation, reduced vibration for quieter operation, and extended rotor life [RUST AND CORROSION RESISTANT] - Aluminum/Zinc coating protection prevents rust and corrosion, extending the life of the rotor while providing a clean look for today's open wheels [ABS AND TRACTION CONTROL READY] - OEM style ABS tone ring (on required applications) provides trouble free operation of Antilock Brake and Traction Control systems [AUTHENTIC BOSCH] - Bosch QuietCast rotors feature an engraved discard thickness that lets you know when the rotor has reached its useful life, and an "on-the-part" Bosch brand name, so you can be confident you are receiving an authentic Bosch product REAR: 310mm; Compatible with select vehicles (Note: vehicle trim level/engine may affect fitment - verify specific vehicle fitment details with fit checker above): AUDI: 2019-20 A3 Quattro, 2019-23 Q3, 2017-23 RS3, 2015-23 S3 Compatible with (continued): AUDI: 2018-22 TT RS Quattro, 2016-23 TTS Quattro; VOLKSWAGEN: 2019-23 Arteon, 2018-23 Atlas, 2020-23 Atlas Cross Sport, 2009-16 CC, 2012-13,2015-19,2022-23 Golf R, 2015-23 GTI, 2006-08 Passat, 2009-10 Passat CC, 2008 R32