After searching for an axelback system I stumbled upon the infamous Roush Mufflers. The Roush Mufflers provided the deepest tone out of any muffler system but has a downfall that all mustang owners complain about, the rasp that builds at 3K rpm. The rasp is very annoying to alot of V6 owners but being that the engine is a V6 you're always going to get some sort of rasp with the exhaust note. Roush also has terrible drone when at cruising speeds on the highway but after having the exhaust for a year you get used to it. Other exhaust systems that don't have as much rasp aren't able to provide a deep tone, you have to hear the exhaust in person. The Roush Mufflers are the most aggressive deep sounding exhaust and though it has it's flaws is still the best choice for the V6 and I would make the same choice again.