probably not. you'll probably be visiting this for the next smog check....max allowable is just that, max allowable.
i would look into getting a cat efficiency test done to see how well it is working. also verify the signals into the dme from the maf, tps, coolant. do a volttage drop to the circuits as well.
if the data coming in is within spec, and the controls are being controlled properly, then the only other variable woul be the cat itself to reduce emissions.