2018-2021 Subaru WRX Base. 2018-2021 Subaru WRX Limited. 2018-2021 Subaru WRX Premium. 4000 SERIES XS Gold provides all the benefits of 4000 Series, with a premium non directional cross drilled and slotted design allowing more brake pad friction dust and gases to escape, plus an attractive gold finish on the rotor hub.
