Anyone tried these yet?

A guy here @ work just put on these new 44 series Flowmasters on his 01 Stang. Everything else on his car is stock. It made it sound pretty good but not very loud.
I have the stadard 40 series and are wondering if these will make mine even louder, which I want. You can see my upgrades in my sig.
My question is if any of you have swapped to these and noticed a better tone, or just stay with what I have.??????? Here is the link

http://www.flowmastermufflers.com/mufflers.html
 
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