R34 HKS Fuel Pump, Includes O-Ring

As performance levels increase via greater airflow efficiency or higher boost levels, fuel delivery is crucial in developing maximum horsepower and in maintaining proper air/fuel ratios. HKS Fuel Pumps are high performance units that work in series with the factory pump to offer sufficient fuel for high boost applications where the factory injector pulse duration is substantially increased or where additional or larger injectors are utilized.