Radium Engineering designed the 2013+ Ford Focus ST/ 16+ Focus RS Port Injection Kit as a purpose-built solution that upgrades fuel delivery at the engine with higher-flow rail hardware and application-specific plumbing for the named platform. It is aimed at builds using larger injectors, higher fuel demand, or AN-based feed and return plumbing that the factory rail arrangement was not designed to support.

Fitment is specific to Ford Focus ST/ 16+ Focus RS Port Injection Kit; confirm the vehicle and surrounding hardware before ordering. Injector height, upper/lower O-ring diameter, and plumbing requirements vary by engine. Match the exact application and injector configuration.