hi everyone, i have a 2001 monte carlo ss, 6 months ago the catalytic converter was replaced and a o2 simulator installed to kill the check engine light,(which has been working oh so perfectly). however it must have been a cheap cat they installed its already starting to break up inside,does anyone have any suggestions on a cat i could buy that will last,besides buying one from the stealership? i would like to dump the o2 simulator and do it right with the oem cat but the cost is nuts. any help would be greatly appriciated. thanks in advance.