Quantum Fuel Systems Fuel Pressure Regulator For Harley The Fuel Pressure Regulators provide OEM or better performance. Compatible with modern ethanol-infused pump gasoline. Features: OEM or better performance Polished corrosion-resistant case to help minimize seizing during non-operation Specifically designed for quiet operation Drop-in replacement Gradient density fuel strainer for superior contaminant filtration Patented check valve technology Compatible with modern ethanol-infused pump gasoline