Decided to go with the Roush for a few reasons. It looks and fits like facory, price, hooks up the stock cold air feed on bottom side and built with factory type plastic which prevents heat. It might also be a bit quieter than Steeda or C&L (both nice units) which is one concern. The negatives are keeping the stock resonators since the stock tube is reused and might make a couple hp less than others. My first three mods are Magnaflow Street axleback (sound great), SCT tune and Roush CAI. I plan on cams and a custom tune in the future - are you all ready to shell out about $1200 for cams ? Oh and that sound tube - deleted - see my post on AFM !