StopTech Sport Slotted + Drilled Brake Rotor Rear Right Subaru STI 2008-2017 | 127.47030R FocusST_2013-2018 which gives them about 1000%

which gives them about 1000% (that's ten times) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice)

The GrimmSpeed Charge Pipe Kit replaces the restrictive stock plastic unit on the FA20-powered WRX with larger diameter CNC mandrel bent aluminum tubing and custom formed silicone

Lowers hydrocarbon emissions

Part #: FW-110BK

By simply replacing the factory bushings with the Cusco unit

StopTech Sport Slotted + Drilled Brake Rotor Rear Right Subaru STI 2008-2017 | 127.47030R FocusST_2013-2018 which gives them about 1000%Fitment Information: 2008 2017 Subaru STI Features: The StopTech slotted and drilled sport rotors are a direct factory replacement for your factory brakes. They offer significantly improved braking performance and look great behind your wheels. The unique cross drilling aids with heat and brake dust dispersal; prevents glazing of the pads; adds bite and improves wet and dry braking performance. Built to last; the black e coating provides protection