@Usmamasghar..........
Do I know you? (Yar)?????
There is a part missing in your kit, its similar to petrol solenoid valve but should be placed in Landirenzo kit, it comes only with Landirenzo and placed next to cng regulator, called generally electronic power Tee, its a gas solenoind with adjusting screw to control the gas flow.
And Please read again my post, I said "without" air filter/air cleaner box.