Hey Guys, i'm looking at getting a cat-back magnaflow exhaust with 2.5" pipes back to 3.5" tips installed next weekend and i'm wondering how much additional horsepower I can expect. I have a S&B cold air intake already installed so i'm looking to free up the back end a little bit. I've heard that the dual exhaust may cause some lost torque and low end power due to losing too much back-pressure, is this true? Any opinions and additional information is great, thanks for all your help!