OVERTAKE Master Cylinder Brace - Subaru 2015-21 WRX, 2015-21 STIOne of the biggest issues that plagues Subaru enthusiasts is the lackluster feel of the factory brake system. The most noticeable problem when it comes to driving spiritedly is the lack of feedback in the brake pedal, which can lead to unpredictable braking and lack of confidence on corner entry. The biggest cause of this is the firewall flexing and deforming under hard braking. This means that not all of the pressure from your foot hitting the pedal