CNG Conversion Kits can change a vehicle that uses traditional gasoline or diesel internal combustion engines to use compressed natural gas, which is a cheaper and more environmentally friendly alternative than traditional gasoline and diesel. Dual-fuel vehicles include two independent fuel tanks, one for gasoline or diesel and the other for CNG. The engine can use either of these two fuels at the same time.

The CNG conversion kit includes steel, aluminum, plastic, or composite CNG gas cylinders; a pressure regulator that converts the storage pressure in the gas tank to a metered pressure; a gas injector or gas mixer for metering fuel; gas cylinders and valves; and necessary Depending on the company that sells CNG, the basic CNG conversion kit may or may not include storage cylinders or other functions. The cost saved by CNG conversion can cover the CNG conversion kit itself, the installation process, and any accessories the customer wants. An important variable is the required fuel capacity because the cost of CNG cylinders is high. However, this cost is usually made up by saving fuel, although this may not apply to older cars with a short lifespan. In addition, income tax credits are granted to customers who install certified modification systems on their cars, which may make CNG conversion kits a more attractive option.

Of course, CNG Injection Kits are also very useful.