Fuel Rail Adapter -4 AN Thread Adapter for GM Vehicles

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    Free In-House Support

  • One Year Limited Warranty

    One Year
    Limited Warranty


GlowShift’s -4 AN Fuel Rail Thread Adapter is designed to replace the Schrader Valve on your fuel rail which allows you to easily install your fuel pressure sender. This adapter easily fits into any GM 5.3L & 6.0L Fuel Rail for quick and easy monitoring of aftermarket fuel pressure sensors. Simply remove the Schrader Valve and install the adapter for quick and easy installation. These adapter fittings are CNC-machined from billet aluminum and attach directly to the Schrader Valve outlet on your GM factory fuel rail. The front side of the fitting also accepts a standard 1/8" NPT fitting for a direct-mount fuel gauge or a gauge sending unit. Every modern GM V8 fuel injection car has a Schrader Valve installed to check fuel pressure. For installation of your -4 AN Fuel Rail Thread Adapter, all you have to do is simply unscrew the insides of the Schrader Valve with a Schrader Valve tool, install the adapter, and then thread the fuel pressure sensor into the 1/8" NPT female port. The flexibility this fuel rail thread adapter fitting gives you is vital because your ability to install onto the engine’s existing GM fuel rail adapter Schrader Valve not only simplifies the process, but also eliminates the need to make any major modifications to your vehicle. GlowShift also includes unlimited tech support and a one-year limited warranty with each purchase.

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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