John Adrian “ Chief Engineer “ Go Fast Bits. Go Fast Bits DV+ Diverter Valve Kit for Ford Focus ST225 / RS 2.5 Turbo 5 Cylinder / Volvo C30 C40 C70 S40 V50 2.5 Turbo 5 Cylinder Engines. This benefit is also particularly noticeable in situations where you are modulating the throttle to balance the car in a corner.