Fuel Rail Adapter -4 AN Thread Adapter for GM Vehicles

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    30 DayNo Hassle Returns

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    Free Shipping Over $50Contiguous USA

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    Free In-House Support

  • One Year Limited Warranty

    One Year
    Limited Warranty


GlowShift -4 AN Fuel Rail Thread Adapters for GM Vehicles are designed to replace the Schrader valve on the fuel rail so you can install a fuel pressure sender. This GM fuel rail pressure gauge adapter fits virtually any GM 5.3 or 6.0 Fuel Rail to monitor aftermarket fuel pressure sensors. Each GM fuel rail schrader valve adapter fitting is CNC-machined from billet aluminum and attaches directly to the Schrader valve outlet on the factory fuel rail. The front side of the fitting has a standard 1/8" NPT female port for a direct-mount fuel gauge or sending unit.

GM Fuel Rail Adapter Installation
Unscrew the insides of the Schrader valve with a Schrader valve tool, install the adapter, and thread the fuel pressure sensor into the 1/8" NPT female port. Installing onto the engine’s factory Schrader valve simplifies the process and eliminates the need to make any major modifications to your vehicle. Nearly every modern GM V8 fuel injection model has a Schrader valve installed to check fuel pressure.

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  • -4 AN Fuel Rail Thread Adapter for GM Vehicles
  • GM Fuel Rail Schrader Valve Adapter
  • GM 5.3 or 6.0 Fuel Rail
  • Replaces Schrader Valve
  • Install Fuel Pressure Gauge or Sender
  • 1/8-27 NPT Female Port
  • CNC-Machined from Billet Aluminum
  • Installation Instructions
  • Free Lifetime Tech Support
  • One Year Limited Warranty
Tech Specs
Female Thread: 1/8-27 NPT
Male Thread: -4 AN
Engine: 5.3L
Engine: 6.0L
Engine: LS1
Engine: LS2
Engine: LS3
Engine: LS6
Engine: LS7
Engine: LSA
Engine: LSX
Gauge Type: Fuel Pressure

Includes an installation guide which is available online and included with your order. You can also visit our library of installation videos which include complete step-by-step tutorials and useful tips on how to install a wide range of GlowShift products.

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