300ZX (Z31) Upper Coolant Bulkhead VG30 Our plenum tops are CNC

Our plenum tops are CNC cut from 6061 Aluminum

NOTE: The Z31 throttle body MUST have the 90-degree elbow of the coolant pipe removed in order to fit this plenum

V-Band flanges for Crossover

making them an excellent replacement to the original part

The CNC-machined billet intake flange provides tighter dimensional control at the runner inlets

300ZX (Z31) Upper Coolant Bulkhead VG30 Our plenum tops are CNCEucadian Performance is proud to offer a replacement upper coolant bulkhead for your Z31! The factory units have been exposed to water, coolant, and various chemicals for over 30 years, making them susceptible to rust and deterioration. These degraded residues can circulate within the cooling system and can lead to leaks and subpar cooling. Using Eucadian Performance's innovative solution, our replacement bulkheads are manufactured from high quality