DeutschTuning proudly offers Radium Engineering FHST Walbro F90000267/274/285 E85 BMW 335i 2007-2016. The Radium Engineering FHST (fuel hanger surge tank) is compatible with all BMW E90/92/93 3-series with the N54 or N55 engine. The Radium Fuel Hanger Surge Tank is a revolutionary way to eliminate fuel starvation that can occur during high performance driving, while also providing a way to upgrade the fuel pumps for high-horsepower engine modifications. This system installs inside the BMW fuel tank on the opposite side of the factory fuel pump and can hold one or two high-flow aftermarket fuel pumps. The stock fuel pump is used to pump fuel into the FHST, while the pumps inside the FHST then supply fuel to the engine. The system is E85 compatible and does not require any permanent modifications for installation.Read below to see how the FHST works. Like OEM, a fuel pressure regulator (FPR) is integrated into the unit. Furthermore, if an intake manifold signal is installed, this FPR can operate at a 1:1 ratio permitting fuel pressure to proportionally increase with boost pressure. The returning low pressure fuel from the FPR is sent back into the FST canister keeping it full. A 6-hole diverter evenly disperses fuel inside the canister preventing air bubbles and foaming. Also, 2 fuel return orifices are included for fine-tuning the desired fuel pressure to the fuel pumps' flow rate. Drop-In OEM Replacement. Permits 1 or 2 Surge Pumps. 1:1 Fuel Pressure Adjustments. Fuel Starvation Protection. Integrated 1-Way Fill Valve. High Current Electrical Hardware. Compatible with Various Pumps. Anodized Aluminum Construction. Gasoline and Ethanol Compliant. Anodized Aluminum 8AN Male Outlet Fitting. Anodized Aluminum Surge Tank Canister. Fuel Resistant Tubing and Wiring. Stainless Steel HardwareRelay(s) and Fuse(s)