Just spoke with the Green Autogas, they said that the traditional type of lpg kit which uses the venturi principle has risk of backfire. They said they do not recommend using this type of system. According to them, there is about 5% chance of getting a backfire and it may damage the airfilter housing. Is this true? LPG users, feedback please.

They were recommending the sequential type which according to them has zero risk of backfire and no power loss. Catch is it will take 3 days to install and they will drill holes in the manifold for the injectors. They further said that if I decide to remove the kit in the future, the holes can be welded or repaired by a machine shop.

If I convert, it will take about a year to recover the cost of the traditional kit. For the sequential type, about 2.5 years. Is it worth to convert? And if so which is the better deal?