The injectors are securely locked within the fuel rail, counteracting engine malfunctions during daily commutes and preventing injector loosening and fuel leakage. For 323i 325i 525i M3 2.5L 3.0L,Material:plastic+Metal Made of high-quality composite plastic and mental, the fuel injectory is more resistant to extreme cold temperatures, reliable and durable. Easy to install, no other modifications needed, saving your time and energy. The pin size, spacing, and wiring sequence are completely consistent with the original factory standard, and no wiring modifications or terminal conversions are required during replacement and installation., Manufacturer: YOUZKA