It is not applicable to cars with no oil return pipe.
Fuel booster is installed on the oil return pipe which is behind the pressure regulator. The fuel injection pressure of the fuel injector can be increased by adjusting it. The fuel injection pressure of the fuel injector can be increased to about 3.0-5.5 kg (usually, the pressure is 3.0 kg or so, generally adjustable to 3.7kg), which is comfortable pressure on the nozzle.
1 x Car Fuel Pressure Regulator
USD 3.09/pieceUSD 4.24/pieceUSD 13.11/pieceUSD 1.24-1.48/pieceUSD 1.13/pieceUSD 10.24/pieceUSD 6.96-7.82/pieceUSD 2.85-3.52/piece