Perrin Master Cylinder Brace WRX / STI (2015-2018) Ford The 3-port systems works by

The 3-port systems works by interrupting the boost signal traveling from the turbo to the wastegate

This kit replaces the stock toe-adjuster and locks toe in place

Adjusting the volume of air helps maintain the perfect amount of boost in your system during shifts without causing compressor surge

Pressure Plate

Perrin Master Cylinder Brace WRX / STI (2015-2018) Ford The 3-port systems works byThe PERRIN Master Cylinder Brace for the 2015+ WRX STI prevents unwanted movement of the master cylinder, allowing for increased brake pedal stiffness. The PERRIN Master Cylinder Brace significantly reduces flex at the firewall, so you get solid brake pedal feel with every application of the brakes. This is very noticeable while under heavy braking and even slowing for a stop sign. The difference can immediately be felt after installation. REDUCE FLEX