Dinan R420-0002 is a complete upgraded fuel-pump assembly for 2012-2018 BMW 228i, 328i, 335i, 428i, 435i, M2, and M235i models using N20/N55 engines. Dinan designed the pump to maintain consistent fuel flow during high-demand operation and low-fuel conditions while remaining controlled by the factory DME without warning faults. This is a Racing Use Only product. Dinan states that it is intended for vehicles used exclusively in competition and warns that installation on an emissions-controlled vehicle is unlawful.