Feature: Direct replacement of your old injector and no modification needed.Good quality effective O-Ring that can seal fuel vapors in and keep them from leaking.High efficient fuel sprays and High Impedance Coil for great performance.The high impedance fuel injector has been tested and exactly matches the internal coil resistance and fuel flow rate of OEM fuel injector.Fuel injectors directly affect the air/fuel ratio for the engine and new fuel injectors do require a new or updated tune. Professional installation is highly recommended.We suggest that you also check the other component of the engine before installation. Specification: O-Rings Included: Yes, preinstalledOrifice Type: 4 Holes DiscMaterial: Metal, PlasticColor: BlackVoltage: DC 12VOE Number: 0280158091 7T4Z9F593B ZZJ113250A CY0113250 62399 FJ1000 84212353 CM5165 INJ699 4G2115Pin Number: 2 PinsDimension: 1.97"x1.38"x0.79"(L*W*H) Package Included: 1 pcs x 0280158091 Fuel Injectors Symptoms of a Bad Fuel Injector Rough Idling/Irritating Idle Noise Engine Misfiring Fuel Leaks Note: Please check the fitment section of this listing before you bid.Please kindly check again your engine volume!This is a non-OEM product, accessory only!This installation should be done by an experienced mechanic who has access to a factory service manual and all required tools! Installation: Step 1: The metal rod over the fuel injectors is the fuel rail. Use the socket and ratchet to remove the bolts and brackets holding the fuel rail in place.Step 2: Make sure the engine is cold enough to touch. Disconnect the battery.Remove plastic engine covers using appropriate socket. Set covers aside.Step 3: Use pliers to disconnect the electrical connector on each injector.Step 4: Lift the fuel rail off of the intake manifold, bringing the injectors with it.Step 5: Examine the injector. If you see a small metal clip that looks like a staple, use a small flathead screwdriver to remove or depress the clip. Then grasp the injector and work back and forth while pulling to remove from the fuel rail. The injector and rail will drip, so have shop towels ready.Step 6: Press the injector into the rail until it stops. Attach the metal clip, if equipped. Reattach the fuel rail. Line up all the injectors over their respective holes, then press each injector until they slide into place.Step 7: Bolt down fuel rail. Reattach fuel line. Plug in fuel injector electrical connections. Reconnect battery.Step 8: Turn the key to the on position and wait 10 seconds then check all the injectors for fuel leaks before turning to engine start. After the engine drops to the normal idle RPM, turn the engine off. Check all the injectors for fuel leaks again.