300ZX Z32 OEM Heater Core Hose Set Part No's: 92400-30P00, 92410-30P00

These hoses are located at the pack of the engine, near the firewall. These hoses allow coolant to flow through the heater core, and return back into the cooling system.  Over time, they will become old and brittle and should therefore be replaced every 100,000km, or at any convenient time.