Anderson Composites Type-AR Carbon Fiber Rear Diffuser for 2016+ Focus RS Fiesta ST The check valve prevents boost

The check valve prevents boost from entering the catch can and pressurizing the crank case as the factory PCV is also weak

Part of the COBB Stage 3 Package

secondary stage activation

Get aerospace level performance

This intercooler should be used for 500whp+ builds or cars looking to do a lot of track racing where the car will be put through extreme conditions

Anderson Composites Type-AR Carbon Fiber Rear Diffuser for 2016+ Focus RS Fiesta ST The check valve prevents boostNormally 6 8 Week Ship Time for Anderson Composite Carbon Fiber Products! TYPE AR REAR DIFFUSER FOR 2016+ FORD FOCUS RS *MOUNTS DIRECTLY TO FOCUS RS OE REAR BUMPER