Dinan Big Turbo Upgrade for BMW N55 engines equipped with an electronic wastegate (EWG). The upgraded turbocharger uses a larger compressor wheel designed to increase airflow and support higher boost while retaining efficiency. Dinan specifies pairing the turbo with appropriate Dinan tuning and an upgraded intercooler where applicable to achieve advertised power gains. The base hardware is complete for rear-wheel-drive installations; xDrive applications require additional hardware kit D313-0117. Confirm the exact vehicle, engine, and wastegate configuration against Dinan's application guide before ordering. Professional installation and wastegate adjustment with factory-level diagnostic tools are required.