300ZX (Z31) Kingfisher Plenum - Passenger Inlet WITH Idle controls

Current Leadtime: 4-7 weeks Eucadian Performance is proud to present our Kingfisher intake plenum for the Z31 platform. A premium upgrade over our gutted plenum offering, designed to transform your SOHC VG30 or VG33 engine's performance and aesthetic appeal. A complete reinvention of the factory Z31 plenum, the Kingfisher utilizes 0.125” (3mm) sheet to form the plenum body, CNC billet 6061 intake flange, and billet plenum top. This combination creates a plenum that weighs less than our gutted plenum offering. The CNC-machined billet intake flange provides tighter dimensional control at the runner inlets, improving airflow transition quality. A 63mm throttle-body flange paired with a passenger inlet elbow allows for smooth flow into the plenum. Billet idle-control flanges are incorporated to ensure factory drivability, idle, and cold-start performance. A bolt-on plenum that preserves OEM features: Maintains factory plenum cover mounting Maintains factory throttle body PCV port tapped to factory specification (1/4-19BSPT) OEM mounting to maintain bolt-on characteristics Vacuum Ports: (2x) 1/8" NPT; (2x) 1/4" NPT Included With Purchase: M6x1.0 Plenum Cover Bolts (6x) M8x1.25 Plenum Mounting Bolts (5x) 3/8" NPT Plugs (4x) As a preventive measure, we recommend applying an anti-seize compound to the NPT plugs before installation to prevent aluminum galling. This ensures that the plugs can be easily removed in the future if needed. Please note: Rerouting of heater core hoses may be required. For those that wish to eliminate idle controls, please check out our 300ZX (Z31) Kingfisher Plenum - Passenger (VG30/VG33).