For BMW Fuel Injector 13647525721 Fitment:Direct Replacement Replace OE Number:7525721, 13647525721 This fuel injector features a specialized nozzle design that effectively enhances fuel atomization, thereby significantly boosting the engine's power output and combustion efficiency This fuel injector optimizes the injection process to improve fuel economy and heighten throttle response sensitivity, providing your vehicle with more abundant power and superior acceleration performance, Manufacturer: Fbxmjoa