Cusco Diffuser Bracket 2002-2007 WRX / 2004-2007 STI

The Cusco Diffuser Bracket is designed for Subaru STI owners looking to add the aerodynamic benefits of a rear diffuser to earlier models. While the 2006-2007 USDM STI came factory-equipped with a rear diffuser to help channel air beneath the vehicle—improving both aerodynamics and high-speed stability—earlier models lacked this feature. The Cusco Diffuser Bracket provides a straightforward solution, allowing owners of prior-year STIs or WRXs to install the factory-style diffuser for a streamlined, functional, and visually appealing upgrade.