I did get word that mrt was redesigning their cats in conjunction with the aid of one of their US distributors. I forget which dealer it was.
The other day I noticed an odd metalic sound whenever I began excelerating. I took a look under the car and one of the spring bolts that attach my catback to the stock cat was missing. This allowed the midpipe to move out of its normal mounting position just slightly but enough for it to vibrate a couple of those heat shielding plates.