top of page
Nissan 300zx Z31 450cc fuel injectors rail 84-89 VG30 VG30ET VG30DE VG30E

Up for grabs is Clean Injection 300zx z31 450cc fuel upgrade kit. Designed to properly supply the 84-89 Nissan Z31 with the additional fuel needed for a mild turbo build. Listing will include a set of 450cc High Impedance injectors. The injector are Dynamically and statically flow tested and balanced to ensure cylinder per cylinder horsepower equilibrium. Injectors will come with flow results at 3 bar, 3.5 bar and 4 bar fuel pressures. The Injectors will come with a set of plug and play injector connectors that will allow the injectors to plugs right into factory injector harness. No cutting or soldering wires necessary. Listing also include our top-feed fuel rail flow-through design which helps eliminate hydraulic fluctuation with a 5/8" I.D through-hole, providing flow capabilities to support over 1300hp in racing applications. The Fuel Rails are machined out of aluminum and anodize coated making it ideal for alcohol base fuels including e85. This kit is designed to to clear the factory intake manifold. No modifications to manifold needed. Included is Clean Injection adjustabe fuel pressure regulator with 1:1 boost reference. Adjustable from 15-65psi. Mounting Bolts, and -an6 fittings are supplied as pictured.


The injectors are compatible with all known fuels including e85. The injectors retains a consistent linear flow from 3bar to 7 bar fuel pressure. Very tuner friendly with fuel trimming down to 1.1ms. The injectors will support over 400whp with correct tuning and fuel type. The injectors utilize a 4 hole disc mist spray pattern with excellent fuel atomization resulting in superb idle conditions. Injectors are dynamically and statically flow tested on the industry leading ASNU Classic test equipment. They are then sealed and packed in balanced sets within 1 percent. Injectors will come with flow sheet with full data specs including injector latency/dead time data for easy tuning.


Clean Injection adjustable fuel pressure regulator with 1:1 Ratio Boost Reference.

Adjustable from 15-65psi of Fuel Pressure.

Plug and Play Fuel Injector Connectors

6pcs Delphi 450cc Fuel Injectors (E85/Alcohol Compatible)

Anodized Black Fuel rails with an6 fittings

Injector test Results and injector latency data included for tuning!


Flow Matched Sets within ≤ 1% Static and Dynamic flow rates

Full Injector Latency Data Provided

Tunable to factory Rock solid Idle

Excellent Fuel Atomization

Direct Plug and Play Fit

Fast Response time

Consistent performance all the way to 100psi+ Fuel Pressures

2 Year Unlimited Mile Warranty

Stainless Steel Internals

Compatible with all known race fuels including E85

Kit is Designed to fit:

1984-1989 Nissan 300zx Z31 with VG30ET, VG30DE and VG30E engine.


Injector specs:


Static Flow Rate @ 43.5PSI 450cc
Coil Resistance: 12 Ohms / High Impedance / Saturated
Cone Spray Angle

11mm Inlet Diameter
Factory fitted with Viton upper and lower o-rings.