It must have been a European thing?? with these mods the car still passes all regulations/tests in the USA, i think even California, and there are so few of the cars that nobody knows what its ‘supposed’ to have. i can understand resonators, because yes my car is louder than most people would want, but a 2nd set of cats?
i would understand if it were a 2009 model or something, but 1999? again, makes me thing it was done for europe 