Radium Engineering BMW E9x 3-Series (N54/N55) Fuel Surge Tank Regulated (Pump Not Included)

The Radium Engineering BMW E9x 3-Series (N54/N55) Fuel Surge Tank Regulated (Pump Not Included) is designed so it maintains a small reserve of fuel around the high-pressure pump or pumps to reduce starvation during sustained cornering, acceleration, and braking. A surge tank is especially useful on track and competition builds where fuel can move away from the factory pickup even when there is still fuel in the main tank.

For BMW E9x 3-Series (N54/N55, it is intended to integrate with the vehicle-specific layout rather than serve as a universal substitute. Radium specifies support for Not included for this version, so confirm the surrounding system uses the same sizes and standards. Pump model and quantity are part-number-specific. Match the surge-tank configuration to the exact pump family being used.