Description: Made of metal and plastic material which is durable and can use for a long time. The good impedance fuel injector has been tested and exactly matches the internal coil resistance and fuel flow rate of OEM fuel injector. This is a non-OEM product, accessory only! Specification: O-Rings Included: Yes, preinstalled Orifice Type: 2 Holes Disc Voltage: DC 12V Material: Metal, Plastic Color: Black, Silver Tone Pin Number: 2 Dimension: 77x34.5x23mm / 3.03"x1.36"x0.91"(L*W*H) OE Number: 13537546244/7546244/1427240Fitment: for BMW Z3 2.8L 1999-2002 for BMW 528i 2.8L 1999-2000 for BMW 525i 2.5L 2001-2005 for BMW Z4 2.5L 2003-2005 for BMW 323i 2.5L 1998-2000 for BMW 2.5L 2000 for BMW 325xi 2.5L 2001-2005 for BMW 325i 2.5L 2001-2005 for BMW 320i 2.2L 2001-2005 for BMW 325Ci 2.5L 2001-2006 Installation: Step 1. Make sure the engine is cool down. Disconnect the battery. Step 2. Remove the bolts and brackets from the fuel rail. Step 3. Disconnect the plug on each injector. Step 4. Lift the fuel rail and remove the injector from the fuel rail. Step 5. Press the new injector into the rail. Reattach the fuel rail and put the injectors in their respective holes. Step 6. Bolt down fuel rail. Reattach fuel line. Plug in injector connectors. Reconnect battery. Step 7. Double check for fuel leaks before and after starting the engine. Package Included:1 x Fuel Injector