The insulator helps stabilize the injector, dampen vibration, and maintain a proper seal to prevent fuel or vacuum leaks. It also ensures correct injector seating and alignment, which is critical for consistent fuel delivery and engine performance. As a wear item exposed to heat and fuel, it is typically replaced during injector service or fuel rail removal to maintain reliable operation in both Fairlady Z and 300ZX applications.
- Fits 16603FA Location
- USDM 300ZX (Z32): 1990–1996 (VG30DE & VG30DETT – NA or TT)
- JDM Fairlady Z (Z32): 1989–1996 (VG30DE & VG30DETT – NA or TT)
- Fits VG30DE & VG30DETT engines (NA or TT)
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