Looking for a great muffler for power and good sound for my 2011 Ecoboost.

Check out last weeks Gears tv they did a new cat back on an ecoboost that reported good #s.

For 40HP and 50TQ, I think I will have to look into this 4" Cat Back. Not sure of Hearthrob though - might compare them with some others and see who stands out. I'm very curious about the trifecta as presented by GearZ. (Exhaust, Intake, and Chip) They didn't tell us what the whole package did for the HP/TQ/MPG though. :-(