Flowmaster 40 series vs. Flowmaster super 44

[RobinHood]

What is the difference between the two mufflers? Is it a sound thing, HP, or what? l am looking into new exhaust and was curious what the difference would be in relation to the 4.0. Thanks

 

[fordboi415]

Its a sound thing lmao the super 44 is just a tad bit deeper tone than the super 40 and a bit more pricy as well, as for horsepower your not going to get any noticeable gains, I'm running the super 44 on my 01 3.0 and it sounds bitchen, either of those 2 mufflers would sound great with your 4.0