4 Cylinder Wear-resistant Gas Injector Rail

4 Cylinder Wear-resistant Gas Injector Rail for CNG LPG Car Conversion

This is a 4-cylinder gas injector rail for CNG and LPG conversions. We built it for workshops that want a straightforward replacement without frequent callbacks.

The valve core is the main upgrade – it handles wear better than basic units. That means less trouble with rough idle or uneven gas delivery down the road. It fits most 4-cylinder gasoline vehicles getting converted. We hear the same complaints from installers all the time: unstable idle, cylinders not getting equal gas, acceleration feeling weak after conversion. This rail addresses those.

It's not a premium priced part – just a solid, dependable one that does its job without creating new problems.

We developed this rail specifically for CNG and LPG conversions. In our experience, injector rails take a beating – constant switching, pressure changes, and gas impurities wear them down fast. When the diaphragm fails early, you get rough idle, uneven distribution, and misfires.

This one uses a solenoid valve design that handles repeated cycling better. It runs at up to 160Hz and works with standard 12V gas ECUs. Good for new conversions, but also a direct swap for old or stuck rails on sedans, SUVs, and light commercials.

Core Product Features

 

This is a 4-cylinder rail for CNG/LPG conversions – plain and simple. How it performs affects idle quality, acceleration, and overall drivability.

What makes it different from the cheaper options is wear resistance and response speed. That matters on engines that see constant load changes – city traffic with stop-and-go, for instance. It's meant to keep working properly without degrading quickly.

Main Application Scenarios

 

Works on most 4-cylinder gasoline passenger cars and light commercials running CNG or LPG. Common uses:

Urban driving with frequent stops

Highway running at steady speeds

Heavier loads or uphill driving

Shops and wholesalers use this as a reliable standard part – not because it's fancy, but because it doesn't cause headaches down the line.

The body has four separate gas outlets. That keeps gas distribution even across cylinders – no single cylinder running lean or rich from poor balance.

The solenoid uses a 2.0Ω coil at 12V – standard for most vehicles. The diaphragm is upgraded to withstand wear from small particles in the gas line.

Pressure range is 0.05–0.2MPa, max 0.3MPa. Inlet Φ10mm, outlets Φ5mm – matches typical autogas plumbing.

Temperature range covers both fuels: -20°C to +120°C for LPG, -40°C to +120°C for CNG.

One thing we always tell people: put a gas filter before the rail and change it regularly. It keeps the rail clean and extends solenoid life more than you'd think.

Each batch of this 4‑cylinder gas injector rail is inspected before shipment, including appearance check, coil resistance test, pressure test and switching response test. This helps ensure basic consistency for aftermarket replacement and new conversion use.

We focus on autogas retrofit spare parts for many years. Our product development is based on common failure modes found in actual installation and road testing, such as valve sticking, slow response and uneven gas distribution.

We support stable mass supply and personalized custom production. For wholesale customers, we can provide technical discussion and quotation according to special project requirements.

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