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The Brembo TY3 Sport disc rotor is a rear rotor for 1999–2009 Subaru WRX STI (GDB) applications, provided as a TY3 Sport rear replacement from Brembo. The product description lists the size code 316x20, indicating the rotor dimensions for rear fitment; use that code when verifying compatibility with the GDB WRX STI's rear brake assembly and configuration.
Brembo 99-09 Subaru WRX STI/WRX STI (GDB) AWD Rear TY3 Sport Disc Rotor - 316X20
