I just recently got an 05 Tacoma 2.7L auto. I like the sound of the exhaust but I want it louder and to have a little bit more punch in the petal, while not sacrificing the fuel economy too much. I've done some research on headers and I like the price of the LC Engineering Part #1041055. and Pro Flow Cat-Back Exhaust System Part # 54-11382. I've heard that there is no reason to go with an aftermarket Catalytic Converter because the factory is a high flow cat. I've done the aftermarket muffler on another vehicle and regret not going with the full exhaust. Are these good upgrade for my truck or just a waste of time???