Psst...
if you are getting an 0430 with 100K, then you likely have a FAILED cat, and thus mil eliminators will ONLY remove the actual light and not the problem. Your cats will still be failed, and you are still getting decreased performance (if they failed in a manner that left them plugged/clogged) Please understand that you will ONLY be removing the EVIDENCE of the problem..
suggest gutting the failed cats hollow or replacing them with either a test pipe (straight through pipe), headers, or a high-flow cat..