Designed to prevent fuel starvation by acting as a reserve tank to keep fuel flowing in the case of the main tank sump running dry, during hard acceleration or turning for example. The BMW fuel surge tank install kit includes all needed brackets and hoses for a complete installation. This surge tank kit installs in place of the factory filter and fuel pressure regulator located in the fuel tank for a easy installation, the factory fuel pump is still in place and acts in tandem with the surge tank pumps by maintaining fuel level in the surge tank.