most probably it is suitable cz all the cars like civic, corola, city, baleno, liana, cultus, etc. are EFi, and almost all works fine on CNG.
and mehan is also EFi now, so cng should work fine.
2-3 days ago, i saw a Mehran EFi Euro-II being converted to CNG,
the installer was saying that landirenzo kit is for 54k Pkr with 50ltr cylinder.