Subaru WRX / STI Master Cylinder Brace made by Perrin Performance Your stock Subaru WRX / STI has a thin sheet metal firewall which is not stiff enough to deal with constant and repeated braking forces. The master cylinder brace from Perrin Performance creates a bridge between the firewall, master cylinder, and the shock tower to significantly reduce flex, giving your brake pedal a nice solid feel during heavy braking situations. The Perrin Master Cylinder Brace is constructed out of 6061-T6 aluminum and finished in an anodized black color for long term durability and corrosion resistance.Perrin Performance Subaru WRX / STI Master Cylinder Brace Features:Reduces flex Stiffens brake pedal feel Stainless steel hardware included Black anodized5 year warranty