I was thinking of getting dual exhaust for my v6 and i was wandering if anyone purchased a mac cat back exhaust that they sell on ebay motors. has anyone had any problems with it? i was wandering if it was worth the 300 bucks to get it. if anyone has the exhaust that im talking about, is there a noticeable boost in horsepower from these exhausts? i was thinking of getting flowmasters, but im not sure its worth the extra money