I have installed CNG from certified CNG they claim to install future inject system which is different and better from sequential/close loop and open loop CNG system
But the fact was they installed a sequential kit which my mechanic showed to me and that too of a local Ahmedabad product. They claimed it to be better than other brands and this is clear false statement that future inject is better than sequential and they are also installing sequential only that to an Indian brand.
This was very disappointing from their end and they are placing regular ads in news papers and on the internet.
So beware of these ads.
Regards