I agree with you that with lambda kits & average improves. But unfortunately I dont agree on this point that cng kit is not approved by govt. All users please use govt approved kits only. I got tes/agp kit istalled and believe me it gave me a very good average and performance even. But I got the kit installed with lambda and with advancer.I
ts worth spending my money. what I advice you is to get lambda and advancer installed in your cars and then see the diff.I agree initially it looks expensive but later you wont regret what you have spend as its worth all the money spent by you
Even I got the same kit installed on my a/t transmission and again it gave me an excellent response>. Initially I did not got advancer installed but then it was creating some troubles and the moment the advancer was installed it was perfect. So what I suggest is go for it for sure.