I have a 2007 Honda Accord 3.0 l V6 and I'm interested in gaining horsepower from simple modifications. So far I've added a cold air intake. I want to add some borla mufflers and I was thinking about adding three high Flow catalytic converters but I don't know enough about them as to whether I should add them or not. How much horsepower would I gain from adding three high Flow catalytic converters eBay MagnaFlow or off-brand parts? I'm not interested to know whether or not they'll hurt the environment or their EPA regulated or whatever I just want to know how much horsepower I would gain from using them please any input is greatly appreciated especially from experienced people. I would be glad to hear from you and can take any constructive criticism. If high flow Catalyticconverters are a waste of money and stupid to do please tell me but if they will give me horsepower please tell me.