Commercial Grade Power. Premium Components. Simple and Perfect Installs.

Our CNG car and truck conversion kits are unique. Working with cutting edge software developer LPGtech, we have developed a CNG conversion kit designed for the China market. Each system is put together to our customers!

SENJIE uses only the highest quality reducer, injector, and ECU controller. Our tuning algorithm is unlike anything you have used before. Fewer complaints, less warranty work, faster installs, and increased customer satisfaction are all benefits of the SENJIE systems. Protect your shop brand and only use the finest systems from SENJIE.
These high-quality "bi-fuel" systems allow your current vehicle to operate on EITHER gasoline OR CNG fuel. You will have a switch on your dashboard that allows you to choose which type of fuel on the fly! No restarting. No engine stall outs. These CNG car conversion kits are very common in almost every other part of the world. As the United States becomes more accomodating of cheap, clean natural gas we will see CNG conversion kits go mainstream. The SENJIEconversion systems are state-of-the-art, designed specifically for CHINA AND OVERSEA CNG standards.

12 MONTHS WARRANTY! BEWARE OF HIDDEN COSTS: Please compare our CNG conversion kit components with the competition. You will see that our system is much more thorough and complete and our price really does include EVERYTHING.


The multi-stage CNG pressure regulator (aka "reducer") takes the high pressure CNG from the cylinder tank and then reduces it to a low pressure natural gas that the car engine can handle. This is a critical and expensive component of the CNG conversion kit. The SENJIECNG regulator is made of the highest quality. When you reduce high pressure gas, the gas will be very cold as it lowers in pressure. Our regulators have an intake hose that pulls water/coolant from your engines cooling system (which is hot of course), and then uses it to keep things from freezing up. SENJIECNG regulators can reliably handle up to about 320 horsepower before requiring a switch to gasoline at high RPM. Over 320 HP and we suggest a our SENJIEPRO-HD kit so you will not experience a pressure drop. Be weary of other brands who tell you they only need a single regulator at this power... the system will run fine for a little while, but end up failing. Our HD kit is the only reducer on the market with these capabilities that dont ruin the system faster.

The ECU is the computer of the CNG kit. It is constantly communicating with your vehicles computer, or OBD system. The SENJIECNG system is state-of-the-art and sealed from weather and the environmental elements.


Our injector rails are what actually sprays the CNG in specifically metered injections into your engine.


The solenoid is an electronically controlled switch to cut on and off the flow of CNG. It is integrated into the reducer for easy installation.


The weather proof wiring harness is what connects the ECU to the fuel injection system. SENJIECNG offers "plug and play" injector harnesses for fast and simple installation. No more cutting and soldering all those wires!