cng on vitz (99-2004) works absolutely perfect! but it iz necesary to install advancer in it, n i recomend u to install italian landi ranzo cng kit only! itz da best kit, n itz advancerz r made to boost da pick of auto trans cars! m uzing da same kit on my vitz04! n v mch satisfied, smooth pick n no probz at all sins a year!
wheraz alto, bro itz already 660cc, i say dnt install cng in it! but if u wanto den install da same kit in it azwel! itz trusted n uzed by me, my family carz n frndz!