The EBC GD7422 is a rear replacement rotor from EBC's GD Sport line, made for the 8V-generation Audi S3 with the 2.0 TFSI turbo four. It is a vented, dimpled-and-slotted cast-iron disc with a thermic black coating that protects the unswept surfaces from rust, and it replaces the factory rear rotor with a pattern meant to manage heat and pad gases during repeated stops.
Stock rear discs handle daily commuting well, but drivers who run back-to-back hard stops on canyon roads, track days, or aggressive street sessions tend to notice fade and heat buildup sooner. The GD pattern uses wide-aperture slots intended to pull air across the pad contact area, and the dimpled faces help release pad gases without through-drilled holes that can crack under thermal cycling. Compared with a cheaper generic slotted disc, this is a better-documented choice for buyers who want a rotor designed around a specific pad reference, so match the FMSI D1108 pad compatibility when selecting friction material. Search terms: 8V S3 rear brake rotor upgrade, EBC GD sport rear rotor 2.0 TFSI, dimpled slotted rear disc 310mm S3.
Fitment data most often lists the 2015 to 2020 8V S3, but some sources show narrower or earlier year ranges, so confirm against your VIN before ordering. Measure your existing rotor before you buy: the listed 310 mm diameter, 22 mm new thickness, and 20 mm minimum thickness let you judge remaining life, while the 65 mm center bore and 5 x 112 mm bolt pattern must match your hub.
