The Radium Engineering FHST (fuel hanger surge tank) permits 1 or 2 aftermarket pumps to supply fuel to the engine. No grinding, bending, or modification of the BMW sheet metal is required. The FHST is compatible with following BMWs:

E90 3-Series (2/2004-9/2008)
E90 3-Series LCI (7/2007-12/2011)
E91 3-Series (2/2004-8/2008)
E91 3-Series LCI (7/2007-5/2012)
E92 3-Series (5/2005-2/2010)
E92 3-Series LCI (11/2008-6/2013)
E93 3-Series (9/2005-2/2010)
E93 3-Series LCI (11/2008-10/2013)

When these BMWs experience high lateral Gs, they inherently suffer from fuel slosh. The FHST is the best solution in preventing fuel starvation. The OEM BMW fuel pump is still retained but is now repurposed as a lift pump to fill and maintain volume in the surge tank. The venturi jet pump(s) functionality is retained.

Features
-Drop-In OEM Replacement
-Permits 1 or 2 Surge Pumps 
-1:1 Fuel Pressure Adjustments
-Fuel Starvation Protection
-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 Hardware
-Relay(s) and Fuse(s)