Hey thanks for the reply. Im not sure whats going on I do not think they are going bad. We took 1 sensor of my friends truck today and did some logging. The datasteam on the sensor is still not right. It kinda looks jagged and drops real fast at times when its upto temp.

Im not throughing any codes. I just happend apon this after some loggin and know its not right. Yours could be doing the same and you dont know it witch would affect performance. I did some searches on the net after I realized this and thats where I found that some people with LS1's where running the Cat Sensor in the front from the Vettes, Something about heat range. Im going to look at one of the Vette sensors in the AM to see if its a direct fit. I just figured I would ask here first in case someone else has been there done this.