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Vehicle Fitment:
2002-2007 Subaru WRX
2004-2007 Subaru STI
The KEIN fuel anti-surge box is designed to install directly inside the factory fuel tank, ensuring a consistent fuel supply to the fuel pump during aggressive driving conditions. This is an ideal solution for circuit, time attack, and track-driven vehicles that experience fuel starvation under high lateral G-forces—especially when the fuel level drops to ¼ tank or less.
By maintaining fuel availability around the pump pickup, this anti-surge box helps prevent lean conditions that can lead to power loss or severe engine damage. It’s a cost-effective upgrade that allows drivers to push harder with confidence when the tank is at its lightest.
In-tank fuel anti-surge solution
Helps prevent fuel starvation during high G-force driving
Ideal for circuit, track, and time attack applications
Allows safe operation with low fuel levels
Stainless steel construction
Street and track torture tested
2-year warranty
Protects engine from fuel starvation
Improves fuel delivery consistency under load
Enhances reliability for motorsport use
Cost-effective alternative to external surge tanks
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