CJM S0 Fuel System, VQ35DE


The CJM S0 system includes all the essentials for converting your 350z or G35 fuel system to a return style configuration along with an adjustable pressure regulator. A return fuel system with manifold pressure reference is critical for maximizing the effectiveness of your fuel pump and injectors while also contributing to uniform fuel distribution to each injector for a safer and more reliable tune.

This is the only fuel system upgrade in its class that retains your factory pulsation dampers, smoothing out your fuel tables and tremendously reducing part throttle stuttering.

Your factory 5/16 feed-side plumbing is untouched and the factory rails are left in place. The S0 system sources return fuel using our exclusive S0 Output Fitting in-between the rear pulsation damper and driver side rail. A -6AN PTFE hose leads fuel to the inlet of the adjustable regulator, and another PTFE return line feeds back to the return correction kit installed to the fuel pump module.

Each external hose in the system is constructed of PTFE with a stainless braid and crimped hose end fittings. The return line to the fuel tank has a black PVC coating to protect your vehicle and wiring harness from any raw SS braid abrasion.

This system utilizes a "return correction", which is a vital modification kit for the fuel pump assembly that properly converts it to return-style while still retaining the factory in-tank venturis. Without this modification the fuel pump would be unable to recover fuel from the left-hand side of the tank.

Included Components and Options

CJ Motorsports Billet S0 Output Fitting Kit:

  • Billet Machined and Anodized 6061-T6 Aluminum
  • Stainless Hardware
  • -6AN Outlet

CJ Motorsports S0 Plumbing Kit:

  • Teflon w/ SS Braid -6 Rail Outlet to Regulator Hose
  • Teflon w/ SS Braid and PVC Black Coated -6 Return Line

Fuel Pressure Regulator Kit:

  • Billet External Adjustable 1:1 Fuel Pressure Regulator
  • Input and Output -6 Fittings
  • -6 Plug

CJ Motorsports Return Correction Kit:

  • Hardware kit for converting factory returnless fuel pump module to accept return fuel
  • Keeps OEM venturi system fully functional


  • Regulator Type: Select your preference from Aeromotive and Fuelab options.
  • DEI Fire Sleeve: This quality insulation for -6 hoses is recommended for turbo and high-heat applications.
  • Mini Fuel Pressure Gauge: When not installing an in-cabin fuel pressure gauge, you will need this to set and monitor fuel pressure.


Detailed Photos and Information:

CJM S0 Output Fitting Kit: Installed to the rear of the driver-side fuel rail, this fitting spaces the fuel pulsation damper rearward to allow for an outlet of fuel to the regulator.


Rail Return Line Kit: A short -6 PTFE SS braided hose is included to plumb the fuel pressure regulator to the CJM S0 Output Fitting.


Fuel Pressure Regulator: Choose your preference from 3 optional regulators that we stock. Each adjustable regulator has opposing side inlets with a downward facing outlet. They can be installed with no vacuum line for a static rail pressure setting, or connect a vacuum reference line for a continuous rail pressure differential (1:1). 


Return Correction Kit: This hardware kit is used to convert the factory fuel pump module to accept return fuel while maintaining integration of the 2 built-in venturi systems