@babar822
In Karachi,go to Classic CNG. It is located in Block-3, Gulshan-e-Iqbal adjacent to famous Alam Nihari on Main Rashid Minhas road near Luckyone Mall (opposite of Moti Mehal stop)
2 Brothers named Amir Bhai & Munna Bhai are running this setup since long there. Go for Landi Renzo CNG kit with 60 Litre CNG cylinder of brand "Faber" or "Inflex"
Some other brands are:
1 Faber Industries, Italy
2 Worthington Heiser, Austria
3 Everest Kanto Cylinder (EKC) Ltd., lndia
4 Inflex, Argentina
5 Dalmine spa, Italy
6 Beijing Tianhai Industrial Co., China
I have been using cng from almost 2 decades now and did conversion kit in Several cars, never felt Big issues....small minor issues are common and ignoreable too so go to conversion with closed Eyes