As you know, I have an 03 EXL-V6, and I'm curious about exhaust upgrades, so I'd like to know what you think. What brands would you recommend? I don't want it to sound too ricey, but I do want an exhaust that has been statistically proven to have the highest horsepower gain over all other exhaust brands and types. In short, I wanna know which exhaust to buy that will give me the most horsepower gain. I've heard Magnaflow is good, but it's usually for muscle cars and trucks. So, what do you think?