Thanks Ccas, I just ordered a couple of Magnaflow metallic substrate converters and I'm going to do exactly that, get the car running as it should and then investigate the problem later. If my car is going to be eating converters at least the Magnaflow Converters are way cheaper then the Vibrant Performance ones so it won't be so painfull in the wallet. I have a high lift cam in the car so I'm running Lucas Hot Rod & Classic High Performance 10w40 motor oil with the higher zinc, also running Ultra 94 in the gas tank, do you think this may have contributed to the Vibrant converters failing over time or was it due to driving on the highway with the 3.91 in the back where the car is running at higher rpms at 60mph and generating more heat. I know most folks don't run cats on this type of application but for those of us that do what is the average life expectency of a converter, a regular daily driver I believe is around 100000miles.
