bro, i bought the car in Nov 2013 - 2006 RXI - i searched the whole market - even all showrooms at new MA JInnah road - all lianas were ff cng in the past but now converted to local cng kit - mine have same factory fitting of double cylinders, piping etc, but just that cng railing in removed and replaced by original Landi Renzo kit which we see in all local efi vehicles..that is simple to tune and whenever i went to a mechanic, uss ne bonnet kholne se pehle pucha k ye ff cng tou nahi na bhai? so, all lianas i saw ran smoothly, including mine - BUT MIND IT - it will give low mileage with local kit - around 110km in full tank w/o AC - whereas the ff cng with injector rail gives better - around 130 or so ( i heard).