I have the super 44 on my 5.7 hemi with my resonator removed. I personally love the sound.
Kolak is right though, it does have some drone on freeway cruising, especially when the hemi mds kicks in. I don't really mind the drone though.......... But I'm used to carpooling in my brothers JK, with JBA shorty headers, a cat back, with no top or doors, rolling at 75mph on 35" Nitto Mud grapplers. You want to talk about highway noise..... Holy cow that jeep is loud. Even my hemi with the super 44 and no resonator sounds quiet compared to driving in his.