The 2.5-litre engine utilises Variable Turbine Geometry (VTG) to deliver a wide powerband and minimise turbo lag. Managing boost pressure accurately is critical when increasing the output of this forced induction system. Upgrading the factory pressure release mechanisms with high-performance Diverter Valves prevents boost leaks, eliminates damaging compressor surge, and ensures immediate, crisp throttle response during rapid PDK or manual gear changes.