Ok well I was wondering whats the difference between the Cavi (GM) stock CAT and a after market high flow cat.....Besides the obvious high flow part... what really is the difference? is there going to be an improvement in power or response with the car?
Yeah, basically the high flow has bigger openings in the honeycomb part I guess. It still does what it is supposed to as far as emissions, and the only real notice is in sound. It just sounds like you don't even have a cat.