This heater return coolant pipe is used on the JDM Fairlady Z and USDM 300ZX to carry warmed coolant from the heater core back into the engine’s cooling circuit. It ensures proper circulation of coolant through the heater core, helping deliver consistent cabin heat and support thermostat regulation of engine temperatures. Due to age and heat cycling, metal heater pipes can corrode or develop leaks at hose connections, so replacement during cooling or heater service improves long‑term reliability and leak‑free operation in both naturally aspirated and twin turbo Z32 models.
- 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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