The insulator serves as a cushion/seal around the base of the fuel injector, helping to damp vibration, reduce injector movement, and maintain proper sealing between the injector and its mounting point to prevent fuel leakage. It is typically replaced in sets (one per injector) during injector service, rail removal, or when correcting leaks due to age or hardened rubber. As a direct OEM‑fit component matching factory specifications, it contributes to reliable injector seating and consistent fuel delivery on both Fairlady Z and 300ZX applications
- Fits 16603F Location
- USDM 300ZX (Z32): 1992–1996 (VG30DE & VG30DETT – NA or TT)
- JDM Fairlady Z (Z32): 1992–1996 (VG30DE & VG30DETT – NA or TT)
- Fits VG30DE & VG30DETT engines (NA or TT)
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